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2215 indexed events in 79 months

2018 | 2019 | 2020 | 2021

December 2024

• Anchor outputs
  • Eclair v0.11.0 stops accepting new non-anchor channels 🔗
  • Core Lightning #7832 spends from anchor outputs even when not urgent 🔗
• Covenants
  • Poll on developer opinions about selected covenant proposals 🔗
  • Oracle-assisted and slashing-based pseudo-covenants 🔗
• Offers
  • LDK #3446 adds support for including a trampoline payment flag in a BOLT12 invoice 🔗
  • BOLT12 update to allow optional inclusion of BIP353 human-readable Bitcoin payment instructions 🔗
• Responsible disclosures
  • Antoine Riard responsibly disclosed a transaction censorship vulnerability 🔗
  • David Harding responsibly disclosed an LN vulnerability allowing theft with miner assistance 🔗
• Channel commitment upgrades
  • LND #8270 implements the channel quiescence protocol designed in part for channel upgrades 🔗
• Channel factories
  • Channel factories may make more payments feasible and reduce the rate of channel depletion 🔗
• Consensus cleanup soft fork
  • Discussion about fixing Murch-Zawy time warp and duplicate transactions in consensus cleanup 🔗
• Duplicate transactions
  • Discussion about fixing remaining duplicate transaction vulnerabilities in consensus cleanup fork 🔗
• Fee sourcing
  • Vulnerability allowing theft from LN channels using variable endogenous fees 🔗
• HTLC endorsement
  • LND #8390 introduces support for setting and relaying an experimental HTLC endorsement 🔗
• OP_CHECKSIGFROMSTACK
  • BIP348 merged with specification of OP_CSFS 🔗
• Output script descriptors
  • Bitcoin Core #30708 adds getdescriptoractivity RPC command 🔗
• Splicing
  • LND #8270 implements the channel quiescence protocol designed in part for splicing 🔗
• Time warp
  • Discussion about fixing Murch-Zawy time warp in consensus cleanup 🔗
• Timelocks
  • Discussion about the impact of time warp attacks on timelocks 🔗
• Trampoline payments
  • LDK #3446 adds support for including a trampoline payment flag in a BOLT12 invoice 🔗

November 2024

• Basic Bitcoin Lisp Language (bll)
  • Introduction of Lisp-like Bitcoin scripting languages and tools: bll, symbll, bllsh 🔗
  • Implementing quantum-safe signatures in symbll versus GSR 🔗
  • Flexible coin earmarks compatible with symbll 🔗
• Channel factories
  • SuperScalar timeout tree channel factory proposal 🔗
  • OPR protocol proposal to improve efficiency of channel factories 🔗
  • LN specification changes proposed to allow pluggable channel factories 🔗
• Ephemeral anchors
  • Bitcoin PR Review Club about ephemeral dust to improve P2A usability 🔗
  • Bitcoin Core #30239 makes ephemeral dust outputs standard, allowing zero-fee transaction relay 🔗
• OP_CAT
  • Post and website examining OP_CAT testing on the default signet 🔗
  • OP_PAIRCOMMIT opcode proposed to function like OP_CAT but without allowing recursive covenants` 🔗
• Timeout trees
  • Superscalar: timeout tree channel factories 🔗
  • OPR protocol proposed to improve timeout tree efficiency 🔗
• Cluster mempool
  • Bitcoin Core #31122 allows computing the effect of a set of changes on the state of the mempool 🔗
• Covenants
  • Idea to add covenants to Bitcoin without consensus changes using hash grinding 🔗
• Discrete log equivalency (DLEQ)
  • Draft BIP for DLEQ proofs 🔗
• Dual funding
  • LDK #3137 adds support for accepting peer-initiated dual-funded channels 🔗
• Duplex micropayment channels
  • SuperScalar timeout tree channel factories using duplex micropayment channels 🔗
• Eltoo
  • Post and website examining LN-Symmetry testing on the default signet 🔗
• LN-Penalty
  • Superscalar: a timeout tree channel factory proposal with leaves using LN-Penalty 🔗
• Multipath payments
  • Core Lightning #7799 introduces the xpay plugin to send optimal multipath payments 🔗
• Offers
  • Core Lightning #7833 enables the offers protocol by default 🔗
• OP_CHECKTEMPLATEVERIFY
  • Post and website examining OP_CHECKTEMPLATEVERIFY testing on the default signet 🔗
• Replace-by-fee (RBF)
  • Bitcoin Core #30592 removes the mempoolfullrbf setting 🔗
• SIGHASH_ANYPREVOUT
  • Post and website examining SIGHASH_ANYPREVOUT testing on the default signet 🔗
• Signet
  • Post and website examining soft fork testing on the default signet 🔗
• Silent payments
  • Draft BIP for DLEQ proofs to support multiple signing with silent payments 🔗
• Simplicity
  • Flexible coin earmarks probably compatible with Simplicity 🔗
• Splicing
  • Core Lightning #7719 achieves interoperability with Eclair for splicing 🔗
• Statechains
  • Spark statechain-like protocol announced 🔗
• Taproot
  • Core Lightning #7800 sets P2TR as the default script for anchor output spends and unilateral closes 🔗
• Uneconomical outputs
  • Bitcoin Core PR Review Club about exempting ephemeral anchors from the dust limit 🔗

October 2024

• Pooled mining
  • Bitcoin Core #30510 adds an inter-process communication (IPC) wrapper to the Mining interface 🔗
  • DATUM protocol announced as an alterative to Stratum v2 local transaction selection 🔗
  • Bitcoin Core #30955 introduces two new methods to the Mining interface for Stratum v2 support 🔗
• Version 3 transaction relay
  • Guide for Wallets Employing Bitcoin Core 28.0 Policies: TRUC transactions 🔗
  • LN developer discussion of using TRUC for version-3 LN commitments 🔗
  • Rust Bitcoin #3450 adds the ability to opt-in to TRUC transactions 🔗
• Channel announcements
  • LN developers discuss upgrades to the gossip protocol 🔗
  • Updates to the version 1.75 channel announcements proposal 🔗
• Ephemeral anchors
  • Guide for Wallets Employing Bitcoin Core 28.0 Policies: P2A output scripts 🔗
  • LN developer discussion of using P2A for version-3 LN commitments 🔗
• Liquidity advertisements
  • Eclair #2848 implements extensible liquidity advertisements 🔗
  • Eclair #2861 implements on-the-fly funding using liquidity ads with either dual-funding or splicing 🔗
• Responsible disclosures
  • Niklas Gögge responsibly disclosed a crash vulnerability affecting Bitcoin Core 🔗
  • Antoine Poinsot and Niklas Gögge responsibly disclosed a consensus vulnerability affecting btcd 🔗
• Splicing
  • Eclair #2861 implements on-the-fly funding using liquidity ads with either dual-funding or splicing 🔗
  • Eclair #2925 introduces support for using RBF with splicing transactions 🔗
• Adaptor signatures
  • LN developer discussion of variations of signature adaptors for adding PTLC support 🔗
• Ark
  • Implementation of Ark demonstrated on mainnet 🔗
• Client-side validation
  • LND #8960 adds custom channel functionality for taproot assets 🔗
• Compact block relay
  • CVE-2024-35202 remote crash vulnerability exploiting compact block reconstruction 🔗
• Dual funding
  • Eclair #2861 implements on-the-fly funding using liquidity ads with either dual-funding or splicing 🔗
• Kindred replace by fee
  • Guide for Wallets Employing Bitcoin Core 28.0 Policies: sibling replacement 🔗
• MuSig
  • Libsecp256k1 adds MuSig2 BIP340-compatible multisig as specified in BIP327 🔗
• Offers
  • BOLTs #798 merges the offers protocol specification which introduces BOLT12 🔗
• Package relay
  • Guide for Wallets Employing Bitcoin Core 28.0 Policies: one parent one child (1P1C) package relay 🔗
• Partially signed bitcoin transactions
  • Draft BIP for sending silent payments with PSBTs 🔗
• Point Time Locked Contracts (PTLCs)
  • LN developer discussion of upgrade paths to using PTLCs 🔗
• Silent payments
  • Draft BIP for sending silent payments with PSBTs 🔗
• Simple taproot channels
  • Updated channel announcements that include support for simple taproot channels 🔗
• Testnet
  • Rust Bitcoin #2945 introduces support for testnet4 🔗
• Version 2 P2P transport
  • Benefits of BIP324 decoy packets 🔗

September 2024

• Async payments
  • Eclair #2865 enables waking up a disconnected mobile peer for async payments or onion messages 🔗
  • LDK #3140 adds support for paying static BOLT12 invoices to send async payments 🔗
• Channel announcements
  • Proving UTXO set inclusion in zero knowledge for more private channel announcement messages 🔗
  • LND #8044 adds new message types for the new v1.75 gossip protocol compatible with taproot channels 🔗
• Client-side validation
  • Shielded client-side validation proposed 🔗
  • LND #9095 and LND #9072 improve custom channel features to improve taproot assets support 🔗
• Pooled mining
  • Stratum v2 extension for fee revenue sharing 🔗
  • Bitcoin Core #30509 adds an -ipcbind option for use by an external Stratum v2 mining service 🔗
• Accountable Computing Contracts
  • BitVM may allow bidirectional bridging of tokens when used with Shielded CSV 🔗
• Anonymity networks
  • DNS seeding for nodes on anonymity networks 🔗
• AssumeUTXO
  • Bitcoin Core #30807 has assumeUTXO nodes during background sync signal NODE_NETWORK_LIMITED 🔗
• Channel jamming attacks
  • Testing of hybrid jamming mitigation and addition of bidirectional reputation 🔗
• Cluster mempool
  • Bitcoin Core #30286 optimizes the candidate search algorithm used in cluster linearizations 🔗
• Coin selection
  • BDK #1581 allows a customizable fallback algorithm in branch-and-bound coin selection 🔗
• Consensus cleanup soft fork
  • Discussion about mitigating merkle tree vulnerabilities in the proposed consensus cleanup soft fork 🔗
• Discreet Log Contracts (DLCs)
  • Lava Loans: DLC-based loan contract execution 🔗
• Fee estimation
  • LDK #3268 adds a more conservative fee estimation method for dust calculations 🔗
• HTLC endorsement
  • Testing of hybrid jamming mitigation and addition of bidirectional reputation 🔗
• Merkle tree vulnerabilities
  • Discussion about mitigating merkle tree vulnerabilities 🔗
• Offers
  • LDK #3140 adds support for paying static BOLT12 invoices to send async payments 🔗
• Onion messages
  • Eclair #2865 enables waking up a disconnected mobile peer for async payments or onion messages 🔗
• OP_CAT
  • OP_CAT research fund 🔗
• Output script descriptors
  • Bitcoin Core #22838 implements multiple derivation path descriptors (BIP389) 🔗
• Partially signed bitcoin transactions
  • BIP353 adds a new standard field to PSBT outputs for DNSSEC proofs 🔗
• Responsible disclosures
  • David Jaenson and Braydon Fuller independently disclose headers DoS attack against Bitcoin Core 🔗
• Sidechains
  • Discussion about affect on sidechains of mitigating merkle tree vulnerabilities 🔗
• Silent payments
  • BitBox02 hardware signing device adds silent payment support 🔗
• Uneconomical outputs
  • LDK #3268 adds a more conservative fee estimation method for dust calculations 🔗

August 2024

• Testnet
  • Bitcoin Core #29775 adds a testnet4 configuration option 🔗
  • BIPs #1601 adds BIP94 specifying testnet4 🔗
  • New time warp attack discovered during analysis of testnet4’s attempted time warp fix 🔗
  • New CPUNet testnet announced with a modified PoW algorithm designed for CPU-only mining 🔗
• Cluster mempool
  • Optimizing block building with cluster mempool 🔗
  • Bitcoin Core #30126 introduces a cluster linearization function for eventual use by cluster mempool 🔗
  • Bitcoin Core #30285 adds two key cluster linearization algorithms 🔗
• Ephemeral anchors
  • Description of a replacement cycling attack against transactions using P2A 🔗
  • Bitcoin Core #30352 introduces a new standard output type, Pay-To-Anchor (P2A) 🔗
  • Bitcoin Core PR Review Club for #30352: Add PayToAnchor (P2A) as standard output script for spending 🔗
• Offers
  • CLN #7474 updates the offers plugin to understand the newly defined experimental TLV ranges 🔗
  • LDK #3139 improves the security of BOLT12 offers by authenticating the use of blinded paths 🔗
  • Proposal to allow opt-in identification and authentication of LN payers when using offers 🔗
• AssumeUTXO
  • Bitcoin Core #30598 removes block height from the assumeUTXO snapshot file metadata 🔗
  • Bitcoin Core #28553 adds assumeUTXO snapshot parameters for mainnet block 840,000 🔗
• Channel commitment upgrades
  • LND #8952 refactors code to make it easier to implement dynamic commitments 🔗
  • LND #8967 adds Stfu wire message to lock channel state before initiating protocol upgrades 🔗
• Exfiltration-resistant signing
  • Dark Skippy: faster exfiltration of HD wallet seeds 🔗
  • Discussion of a simple (but imperfect) anti-exfiltration protocol 🔗
• HTLC endorsement
  • Eclair #2884 implements BLIP4 for HTLC endorsement 🔗
  • BLIPs #27 adds BLIP4 for an experimental HTLC endorsement signaling protocol 🔗
• Pooled mining
  • Stratum v2 benchmarking tool released 🔗
  • Discussion of potential Stratum v2 high validation cost and invalid shares attack 🔗
• Rendez-vous routing
  • LND #8735 and #8764 improve LND’s support for blinded paths, including for multipath 🔗
  • BLIPs #39 adds BLIP39 for an optional field b in BOLT11 invoices to communicate a blinded path 🔗
• Replace-by-fee (RBF)
  • Nodes with full-RBF successfully reconstructing more compact blocks than nodes with only opt-in RBF 🔗
  • Bitcoin Core #30493 enables full RBF by default 🔗
• Accountable Computing Contracts
  • Optimistic verification of zero-knowledge proofs using CAT, MATT, and Elftrace 🔗
• Block withholding
  • Block withholding attacks and potential solutions 🔗
• Client-side validation
  • Taproot Assets v0.4.0-alpha released 🔗
• Compact block relay
  • Recent statistics on the success rate of compact block reconstruction 🔗
• Erlay
  • Announcement of new Hyperion network simulator intended for eventual testing of Erlay 🔗
• Fee estimation
  • Bitcoin Core #30275 updates estimatesmartfee RPC default from conservative to economical 🔗
• Inbound forwarding fees
  • LND #8886 updates the BuildRoute function to support inbound forwarding fees 🔗
• Merkle tree vulnerabilities
  • LDK #3215 rejects transactions less than 65 bytes to protect against merkle tree vulnerabilites 🔗
• Onion messages
  • Discussion of onion denial-of-service risk with proposed mitigations 🔗
• Replacement cycling
  • Replacement cycle attack against pay-to-anchor 🔗
• Responsible disclosures
  • Lloyd Fournier, Nick Farrow, and Robin Linus disclosed Dark Skippy fast seed exfiltration attack 🔗
• Threshold signature
  • BIP proposed for creating FROST scriptless threshold signatures for Bitcoin 🔗
• Time warp
  • New time warp vulnernability affecting testnet4 despite previous time warp fixes 🔗

July 2024

• Cluster mempool
  • Introduction to cluster linearization 🔗
  • Discussion about replacing CPFP carve-out with either TRUC or RBFR to unblock cluster mempool 🔗
  • Question: why is restructure of mempool required with cluster mempool? 🔗
• CVEs (various)
  • Remote code execution due to bug in miniupnpc, similar to CVE-2015-6031 🔗
  • CVE-2020-14198: Unbound Bitcoin Core ban list CPU/memory DoS 🔗
  • CVE-2015-3641: out-of-memory crash when Bitcoin Core would accept over 4 GB in messages from peers 🔗
• Free relay
  • Disclosure of a free relay attack exploiting differences in RBF policy 🔗
  • Discussion of free relay related to replace-by-feerate proposals 🔗
• Offers
  • Discussion of fully implementing offers versus incremently adding features from it 🔗
  • Core Lightning #7461 adds support for nodes to self-fetch and self-pay BOLT12 offers and invoices 🔗
• Onion messages
  • Core Lightning #7455 makes multiple changes to its onion message defaults 🔗
  • BOLTs #1173 makes the channel_update field optional in failure onion messages 🔗
• Pooled mining
  • Bitcoin Core #30200 adds a new mining interface to better support Stratum v2 in the future 🔗
  • Stratum.work website with real-time visualization of Stratum messages from several mining pools 🔗
• AssumeUTXO
  • Bitcoin Core #30320 only loads a AssumeUTXO snapshot if it’s the ancestor of the most-PoW chain 🔗
• Async payments
  • LDK #3125 introduces support for encoding and parsing messages needed for async payments 🔗
• HD key generation
  • BIP328 added with a specifications BIP32-compatible MuSig2 key derivation 🔗
• Just-In-Time (JIT) channels
  • BLIPs #25 allows accepting underfunded HTLCs in support of JIT channel creation 🔗
• Miniscript
  • BIP379 added with a specification for Miniscript 🔗
• MuSig
  • BIPs 328, 390, and 373 added with specifications for MuSig2 key derivation, descriptors, and PSBTs 🔗
• Output script descriptors
  • BIPs 328, 390, and 373 added with specifications for MuSig2 key derivation, descriptors, and PSBTs 🔗
• Partially signed bitcoin transactions
  • BIPs 328, 390, and 373 added with specifications for MuSig2 key derivation, descriptors, and PSBTs 🔗
• Rendez-vous routing
  • Proposed BLIP for adding a blinded path field to BOLT11 invoices 🔗
• Replace-by-fee (RBF)
  • Question: why does RBF rule #3 exist? 🔗
• Responsible disclosures
  • Peter Todd responsibly disclosed a free relay attack exploiting RBF policy differences 🔗
• Testnet
  • Bitcoin Core PR Review Club about testnet4 🔗
• Threshold signature
  • ChillDKG distributed key generation protocol for FROST 🔗
• Time warp
  • Question: how many blocks per second can sustainably be created using a time warp attack? 🔗
• Timelocks
  • BIP46 added for timelocked fidelity bonds 🔗
• Version 3 transaction relay
  • Criticism of motivations for preferring TRUC over replace-by-feerate as a pinning solution 🔗

June 2024

• Offers
  • LDK #3078 adds support for inspection of BOLT12-returned invoices before payment 🔗
  • LDK #3082 adds an interface for building static reusable offers 🔗
• Onion messages
  • BLIPs #32 adds BLIP32 describing DNS-based payment instructions with onion messages 🔗
  • Eclair #2854 and LDK #3083 implement BOLTs #1163 to make message delivery failures more private 🔗
• Rendez-vous routing
  • LDK #3080 allows creating either compact or regular binded paths 🔗
  • Eclair #2867 defines an encoded node ID to use to identify mobile wallets in blinded paths 🔗
• Silent payments
  • Continued discussion about using PSBTs with silent payments 🔗
  • BIPs #1620 and #1622 make minor updates to the BIP352 specification of silent payments 🔗
• Version 3 transaction relay
  • BIPs #1541 adds BIP431 with a specification of TRUC transactions 🔗
  • Bitcoin Core #29496 makes TRUC transactions standard 🔗
• Anchor outputs
  • Core Lightning #7388 removes the ability to create old non-zero-fee anchor-style channels 🔗
• Channel commitment upgrades
  • BOLTs #869 introduces a new channel quiescence protocol, in part for channel upgrades 🔗
• CLTV expiry delta
  • LND #8491 adds a cltv_expiry flag on the lncli RPC commands addinvoice and addholdinvoice 🔗
• Coin selection
  • Effect of SubtractFeeFromOutputs on coin selection in Bitcoin Core 🔗
• Covenants
  • Idea to add covenants to Bitcoin without consensus changes using functional encryption 🔗
• Discrete log equivalency (DLEQ)
  • Continued discussion of PSBTs for silent payments with DLEQ proofs to verify correct ECDH generation 🔗
• Fee estimation
  • LND #8730 introduces an RPC command lncli wallet estimatefee 🔗
• OP_CAT
  • OP_CAT script to validate proof of work 🔗
• Package relay
  • Bitcoin Core #28984 adds support for a limited version of package replace-by-fee 🔗
• Payment probes
  • LDK #3103 begins using data collected from frequent probing in its testing benchmarks 🔗
• Partially signed bitcoin transactions
  • Continued discussion about using PSBTs with silent payments 🔗
• Quantum resistance
  • Draft BIP for quantum-safe address format 🔗
• Replace-by-fee (RBF)
  • Bitcoin Core #28984 adds support for a limited version of package replace-by-fee 🔗
• Responsible disclosures
  • Matt Morehouse responsibly disclosed vulnerability affecting LND onion packet parsing 🔗
• Testnet
  • BIP and experimental implementation of testnet4 🔗
• Time warp
  • Draft BIP for testnet4 includes fix for time warp attack 🔗
• Version 2 P2P transport
  • Rust Bitcoin #2644 adds HKDF component in support of a BIP324 implementation 🔗
• X-only public keys
  • Should an even Y coordinate be enforced after every key-tweak operation, or only at the end? 🔗

May 2024

• Output script descriptors
  • Notes from Bitcoin developer discussion about descriptors for silent payments 🔗
  • BIP388 added with wallet policies for descriptor wallets 🔗
  • BIPs #1567 adds BIP387 with new multi_a() and sortedmultia_a() descriptors 🔗
• Package relay
  • BIP331 assigned to ancestor package relay proposal 🔗
  • Bitcoin Core #28970 adds support for one-parent-one-child (1p1c) package relay with no P2P changes 🔗
  • Bitcoin Core #30000 indexes orphan txes by wtxid, removing a problem with orphan-based package relay 🔗
• Silent payments
  • Notes from Bitcoin developer discussion about multiple aspects of silent payments 🔗
  • BIPs #1458 adds BIP352 for silent payments 🔗
  • Discussion about using PSBTs with silent payments 🔗
• Onion messages
  • LDK #2973 adds support for intercepting onion messages to facilitate async payments 🔗
  • CLN #7304 adds support for direct peer connections for message relay 🔗
• OP_CAT
  • BIPs #1525 adds BIP347 which proposes an OP_CAT opcode for tapscript 🔗
  • Bitcoin Inquisition 27.0 begins enforcing OP_CAT on signet 🔗
• OP_CHECKTEMPLATEVERIFY
  • Exploding keys, a soft fork proposal with similar capabilities to CTV 🔗
  • BIP119 extensions for smaller hashes and arbitrary data commitments 🔗
• Accountable Computing Contracts
  • BitVMX: an alternative to BitVM for verification of program execution 🔗
• AssumeUTXO
  • Notes from Bitcoin developer discussion about assumeUTXO for mainnet 🔗
• Async payments
  • LDK #2973 adds support for intercepting onion messages to facilitate async payments 🔗
• Channel announcements
  • New anonymous usage tokens proposed that could be used to improve channel announcement privacy 🔗
• Channel commitment upgrades
  • Analysis of multiple proposals for upgrading LN channels 🔗
• Codex32
  • Penlock proposed as an alternative to codex32 that provides BIP39 seed phrase splitting 🔗
• Coin selection
  • Notes from Bitcoin developer discussion about coin selection 🔗
• Consensus cleanup soft fork
  • Notes from Bitcoin developer discussion about consensus cleanup 🔗
• Cross-input signature aggregation (CISA)
  • Notes from Bitcoin developer discussion about CISA 🔗
• Ecash
  • Proposal to pay miners with ecash 🔗
• Hash Time Locked Contract (HTLC)
  • Core Lightning #7190 introduces chainlag to allow safely sending payments during block sync 🔗
• Inbound forwarding fees
  • LND #8627 defaults to rejecting channel settings that require above-zero inbound forwarding fees 🔗
• Miniscript
  • Draft BIP proposed for miniscript 🔗
• OP_CHECKSIGFROMSTACK
  • Lamport signatures providing OP_CSFS alternative without consensus changes 🔗
• Partially signed bitcoin transactions
  • Discussion about using PSBTs with silent payments 🔗
• Quantum resistance
  • Consensus-enforcement of quantum-resistant lamport signatures without consensus changes 🔗
• Signet
  • Notes from Bitcoin developer discussion about signet and testnet4 🔗
• Simple taproot channels
  • Discussion of channel upgrade methods, such as switching to simple taproot channels 🔗
• Testnet
  • CoreDev.tech Berlin event with discussion about testnet4 🔗
• Utreexo
  • Release of utreexod beta 🔗

April 2024

• Replace-by-fee (RBF)
  • Bitcoin Core #29242 lays the groundwork for package replace by fee 🔗
  • Analysis of how cluster mempool would’ve affected RBF in 2023 🔗
  • Question about the size of transactions that opt-in to RBF, opt-out of RBF, and replacements 🔗
• Cluster mempool
  • Bitcoin Core #29242 introduces utility functions to compare two feerate diagrams 🔗
  • Analysis: what would have happened if cluster mempool had been deployed a year ago? 🔗
• Consensus cleanup soft fork
  • Renewed discussion of consensus cleanup soft fork 🔗
  • Question: where exactly is the ‘off-by-one’ difficulty bug and how does it relate to time warp? 🔗
• Accountable Computing Contracts
  • Development of domain-specific languages for smart contracting, including with BitVM 🔗
• Accidental confiscation
  • Amnesty proposed for potential old uses of OP_CODESEPARATOR in new cleanup proposal 🔗
• Coin selection
  • LND #8515 updates multiple RPCs to accept the name of the coin selection strategy to be used 🔗
• Compact block relay
  • Proposal to use weak blocks to improve compact block relay when mempool policies diverge 🔗
• Duplicate transactions
  • Updated consensus cleanup proposal to address Block 1,983,702 problem 🔗
• Eclipse attacks
  • Bitcoin Core #29850 limits the max number of IP addresses accepted from an individual DNS seed 🔗
• Fee estimation
  • Discussion about weak blocks helping with feerate estimation 🔗
• Gap limits
  • BDK #1351 makes several changes to how BDK interprets the stop_gap parameter 🔗
• Inbound forwarding fees
  • LND #6703 and #6934 add support for inbound routing fees 🔗
• Package relay
  • Bitcoin Core #29242 lays the groundwork for package replace by fee 🔗
• Rendez-vous routing
  • LND #8159 and #8160 add experimental support for sending payments to blinded routes 🔗
• Taproot
  • Rust Bitcoin #2652 begins returning the internal taproot key when signing for a taproot input 🔗
• Testnet
  • Discussion about resetting and modifying testnet 🔗
• Time warp
  • Question: where exactly is the ‘off-by-one’ difficulty bug and how does it relate to time warp? 🔗
• Transaction pinning
  • Discussion about weak blocks helping with transaction pinning 🔗
• Version 3 transaction relay
  • Bitcoin Core #29242 lays the groundwork for package replace by fee with v3-compatible packages 🔗

March 2024

• Basic Bitcoin Lisp Language (bll)
  • Overview of Chia Lisp for Bitcoiners 🔗
  • Overview of BTC Lisp: an enhanced scripting language for Bitcoin 🔗
• Dual funding
  • Eclair #2829 allows plugins to set a policy for contributing funds in a dual-funded channel open 🔗
  • LDK #2419 adds a state machine for handling interactive transaction construction 🔗
• Partially signed bitcoin transactions
  • Rust Bitcoin #2458 adds support for signing PSBTs that include taproot inputs 🔗
  • BTCPay Server #5852 adds support for scanning BBQr animated QR codes 🔗
• Coin selection
  • LND #8378 makes several improvements to LND’s coin selection features 🔗
• Fee estimation
  • Discussion of incorporating live mempool data into Bitcoin Core’s feerate estimation 🔗
• Fee sourcing
  • More efficient fee sponsorship for exogenous fees compared favorably to endogenous fees 🔗
• Fee sponsorship
  • Proposals for more block space efficient transaction fee sponsorship 🔗
• Free relay
  • Disclosure of a free relay attack against Bitcoin Core and some other nodes 🔗
• Kindred replace by fee
  • Bitcoin Core #29306 adds sibling eviction for unconfirmed v3 transaction children 🔗
• Merkle tree vulnerabilities
  • Bitcoin Core #29412 checks for every known way to mutate a valid block into an invalid block 🔗
• Miniscript
  • Ledger Bitcoin App 2.2.0 adds miniscript support for taproot 🔗
• MuSig
  • PSBTs for multiple concurrent MuSig2 signing sessions 🔗
• OP_CAT
  • Bitcoin PR Review Club for OP_CAT on signet with Bitcoin Inquisition 🔗
• Payment probes
  • LND #8136 updates the EstimateRouteFee RPC to use payment probing 🔗
• Replace-by-fee (RBF)
  • BitGo adds RBF support 🔗
• Schnorr signatures
  • Explanation for why BIP340 uses secp256k1 instead of a different curve 🔗
• Simple taproot channels
  • LND #8499 makes significant changes to the TLV types used for simple taproot channels 🔗
• Simplicity
  • Comparisons betwen Simplicity and BTC Lisp 🔗
• Soft fork activation
  • Trustless onchain betting on potential soft forks 🔗
• Splicing
  • Phoenix Wallet v2.2.0 adds support for splicing using the quiescence protocol 🔗
• Spontaneous payments
  • LDK #2935 begins supporting sending keysend payments to blinded paths 🔗
• Trampoline payments
  • LDK #2756 adds support for including a trampoline routing packet in its messages 🔗
• Version 2 P2P transport
  • New project to create a BIP324 proxy for light clients 🔗
• Vaults
  • BIPs #1421 adds BIP345 for the OP_VAULT opcode and related consensus changes 🔗

February 2024

• Version 3 transaction relay
  • Challenges opening zero-conf channels when using the initially allowed v3 transaction topology 🔗
  • Ideas for post-v3 relay enhancements after cluster mempool is deployed 🔗
  • Research about historic use of anchor outputs for possibly imbuing them with v3 properties 🔗
  • Bitcoin Core #28948 adds support for (but does not enable) version 3 transaction relay 🔗
• Anchor outputs
  • Research about historic use of anchor outputs for possibly imbuing them with v3 properties 🔗
  • Core Lightning #6785 makes anchor-style channels the default 🔗
  • Eclair #2816 allows the node operator to choose the max fee for an anchor output 🔗
• Dual funding
  • Requirement to verify external inputs use segwit in dual funding and related protocols 🔗
  • BOLTs #851 adds support for dual funding and interactive tx construction to the LN specification 🔗
  • LDK #2770 begins preparing to later add support for dual-funded channels 🔗
• Cluster mempool
  • Cluster mempool could help solve challenges opening zero-conf channels with v3 transaction relay 🔗
  • Ideas for post-v3 relay enhancements after cluster mempool is deployed 🔗
• Coin selection
  • Bitcoin Core #27877 updates Bitcoin Core’s wallet with CoinGrinder coin selection strategy 🔗
  • New coin selection strategy for LN liquidity providers 🔗
• Ecash
  • Discussion of the design of Cashu and other ecash systems 🔗
  • Sending and receiving ecash using LN and ZKCPs 🔗
• Replace-by-fee (RBF)
  • Proposal for replace-by-feerate to avoid transaction pinning 🔗
  • Pure replace by feerate is not guaranteed to be incentive compatible 🔗
• Accountable Computing Contracts
  • Sending and receiving ecash using LN and ZKCPs 🔗
• Compact block relay
  • Improvements to compact block peer selection made to address block stalling attack 🔗
• Eclipse attacks
  • Improved reproducible ASMap creation process 🔗
• Free relay
  • Concern about replace by feerate allowing free relay 🔗
• HD key generation
  • Rust Bitcoin #2451 removes the requirement that an HD derivation path start with an m 🔗
• Kindred replace by fee
  • What if v3 semantics and sibling replacement had been applied to anchor outputs a year ago? 🔗
• Offers
  • Human readable payment instructions proposed that are compatible with offers 🔗
• OP_CAT
  • Simple vault prototype using OP_CAT and schnorr signatures 🔗
• Payjoin
  • Mutiny Wallet v0.5.7 adds support for payjoin 🔗
• Pooled mining
  • How does the TIDES payout scheme work? 🔗
• Responsible disclosures
  • Eugene Siegel responsibly disclosed a Bitcoin Core block stalling bug affecting LN 🔗
• Silent payments
  • Human readable payment instructions proposed that are compatible with silent payment addresses 🔗
• Splicing
  • Challenges with splicing and zero-conf channels when using v3 transaction topology 🔗
• Taproot
  • Taproot massively reduces worst case bandwidth for malleablity protection in contract protocols 🔗
• Testnet
  • Core Lightning 24.02 includes the fix for a transaction parsing bug on testnet 🔗
• Transaction pinning
  • Proposal for replace-by-feerate to avoid transaction pinning 🔗
• Version 2 P2P transport
  • Bitcoin Core #29347 enables v2 P2P transport by default 🔗
• Vaults
  • Simple vault prototype using OP_CAT and schnorr signatures 🔗
• Zero-conf channels
  • Challenges opening zero-conf channels when using the initially allowed v3 transaction topology 🔗

January 2024

• Version 3 transaction relay
  • Discussion about the costs of pinning when v3 policies are used 🔗
  • Discussion about LN anchors and v3 transaction relay proposal 🔗
  • Discussion about cluster mempool and a need for a CPFP carve out replacement like v3 relay 🔗
  • Proposed changes to LN for v3 relay and ephemeral anchors 🔗
  • Idea to apply RBF rules to v3 transactions to allow removing CPFP carve-out for cluster mempool 🔗
• Cluster mempool
  • Discussion about cluster fee estimation 🔗
  • Overview of cluster mempoool, including discussion about its effect on CPFP carve-out 🔗
  • Interplay between cluster mempool, CPFP carve-out removal, and LN use of v3 relay 🔗
  • Idea to apply RBF rules to v3 transactions to allow removing CPFP carve-out for cluster mempool 🔗
• Ephemeral anchors
  • Discussion about ephemeral anchors for LN and v3 transaction relay proposal 🔗
  • Discussion about cluster mempool and a need for a CPFP carve out replacement like ephemeral anchors 🔗
  • Discussion about Miner Extractable Value (MEV) in non-zero ephemeral anchors 🔗
  • Proposed changes to LN for v3 relay and ephemeral anchors 🔗
• Fee sourcing
  • Argument that frequent use of exogenous fees may put mining decentralization at risk 🔗
  • Implications of exogenous fees on safety, scalability, and costs 🔗
  • An alternative to exogenous anchor outputs: endogenous fees with presigned incremental RBF bumps 🔗
  • Opposition to CTV based on commonly requiring exogenous fee 🔗
• Rendez-vous routing
  • LDK #2781 and #2688 update support for sending and receiving blinded payments 🔗
  • LND #8095 and #8142 add additional logic to parts of LND’s codebase for handling binded paths 🔗
  • LDK #2791, #2801, and #2812 complete adding support for route blinding 🔗
  • Eclair #2811 allows trampoline payments to use a blinded path for the ultimate receiver 🔗
• Responsible disclosures
  • Niklas Gögge responsibly disclosed two vulnerabilities affecting LND 🔗
  • Matt Morehouse responsibly disclosed vulnerability affecting Core Lightning 🔗
  • Niklas Gögge responsibly disclosed a consensus bug affecting btcd 🔗
• Channel factories
  • Proposal for fee-dependent timelocks that would make mass factory closures more safe 🔗
  • Proposal for a mass-exit protocol that allows highly efficient payment batching 🔗
• CPFP carve out
  • Discussion about the incompatibility between cluster mempool and CPFP carve-out 🔗
  • Idea to apply RBF rules to v3 transactions to allow removing CPFP carve-out for cluster mempool 🔗
• Joinpools
  • Proposal for fee-dependent timelocks that would make mass joinpool closures more safe 🔗
  • Proposal for a mass-exit protocol that allows highly efficient payment batching 🔗
• OP_CHECKTEMPLATEVERIFY
  • Mashup of OP_CTV and OP_CSFS proposed, along with new OP_INTERNALKEY 🔗
  • Opposition to CTV based on commonly requiring exogenous fee 🔗
• Out-of-band fees
  • Discussion about the effect of out-of-band fees on proposed fee-dependent timelocks 🔗
  • Frequent use of exogenous fees may risk mining decentralization due to out-of-band fees 🔗
• Output script descriptors
  • How to specify unspendable keys in descriptors 🔗
  • Proposed BIP specifying how to include descriptors in PSBTs 🔗
• Trampoline payments
  • Eclair #2810 allows trampoline routing infomation to use more than 400 bytes 🔗
  • Eclair #2811 allows trampoline payments to use a blinded path for the ultimate receiver 🔗
• Trimmed HTLC
  • Discussion about placing trimmed HTLC value in ephemeral anchor outputs and consequences for MEV 🔗
  • Continued discussion about placing trimmed HTLC value in ephemeral anchor outputs 🔗
• Accountable Computing Contracts
  • Verification of arbitrary programs using proposed opcode from MATT 🔗
• Anchor outputs
  • Discussion about LN anchors and v3 transaction relay proposal 🔗
• Annex
  • Suggestion to store fee-dependent timelock parameters in the taproot annex 🔗
• Anonymity networks
  • Bitcoin Core #29200 allows the I2P to use connections encrypted with both ECIES-X25519 and ElGamal 🔗
• Channel announcements
  • Disclosure of two past vulnerabilities in LND gossip handling 🔗
• CLTV expiry delta
  • LN-Symmetry requires longer CLTV expiry deltas than expected 🔗
• Coin selection
  • New coin selection strategies proposed and tested for Bitcoin Core 🔗
• Eltoo
  • LN-Symmetry research implementation with summary of initial results 🔗
• Expiration floods
  • Mitigating expiration floods with fee-depedent timelocks 🔗
• Fee estimation
  • Cluster fee estimation to improve accuracy in a world with CPFP fee bumping 🔗
• Free relay
  • Node operator goals include maximizing miner revenue without allowing free relay 🔗
• Kindred replace by fee
  • Kindred replace by fee 🔗
• MATT
  • Verification of arbitrary programs using proposed opcode from MATT 🔗
• Onion messages
  • LDK #2723 adds support for sending onion messages using direct connections 🔗
• OP_CHECKSIGFROMSTACK
  • Mashup of OP_CTV and OP_CSFS proposed, along with new OP_INTERNALKEY 🔗
• Payment batching
  • Proposal for a pool exit protocol that allows highly efficient payment batching 🔗
• Partially signed bitcoin transactions
  • Proposed BIP specifying how to include descriptors in PSBTs 🔗
• Replace-by-fee (RBF)
  • Idea to apply RBF rules to v3 transactions to allow removing CPFP carve-out for cluster mempool 🔗
• Simple taproot channels
  • LND #7733 updates its watchtower support for simple taproot channels 🔗
• Statechains
  • Mercury Layer announced as an implementation of statechains using blind signing 🔗
• Timelocks
  • Soft fork proposal for fee-dependent timelocks 🔗
• Transaction pinning
  • Discussion about the costs of pinning when v3 transaction relay policies are used 🔗
• Unannounced channels
  • Core Lightning #6869 updates the listchannels RPC to no longer list unannounced channels 🔗
• Version 2 P2P transport
  • Bitcoin Core #29058 begins using v2 P2P transport by default for some connections 🔗
• Watchtowers
  • LND #7733 updates its watchtower support for simple taproot channels 🔗

December 2023

• Cluster mempool
  • Multiple discussions about cluster mempool 🔗
• Duplicate transactions
  • What is the Block 1,983,702 Problem? 🔗
• Fee estimation
  • BTCPay Server #5490 begins using fee estimates from mempool.space 🔗
• Liquidity advertisements
  • Discussion about griefing liquidity advertisements 🔗
• Payjoin
  • Payjoin client for Bitcoin Core released 🔗
• Pooled mining
  • Stratum v2 mining pool launches 🔗
• Partially signed bitcoin transactions
  • BBQr encoding scheme announced for encoding PSBTs and other data 🔗
• Replace-by-fee (RBF)
  • Discussion of cluster mempool for RBF 🔗
• Simple taproot channels
  • Zeus v0.8.0 released with support for simple taproot channels 🔗

November 2023

• Offers
  • Ideas for creating a Lightning Address protocol compatible with offers 🔗
  • Eclair #2752 allows an offer to reference a node using a short channel identifier (SCID) 🔗
• Accountable Computing Contracts
  • Publication of two BitVM proof of concepts 🔗
• Basic Bitcoin Lisp Language (bll)
  • Hypothetical comparison of a Lisp-based scripting language to an upgraded Bitcoin Script language 🔗
• CLTV expiry delta
  • BOLTs #1086 specifies 2,016 blocks as the default absolute maximum CLTV expiry 🔗
• Covenants
  • HTLC aggregation with covenants 🔗
• Child pays for parent (CPFP)
  • Making anyone-can-spend outputs for CPFP with non-malleable txids 🔗
• Dual funding
  • Core Lightning #6824 updates the implementation of the interactive funding protocol 🔗
• Ephemeral anchors
  • Making ephemeral anchor spends with non-malleable txids 🔗
• Fee estimation
  • Rust Bitcoin #2213 amends the weight prediction for P2WPKH inputs during fee estimation 🔗
• Hash Time Locked Contract (HTLC)
  • HTLC aggregation with covenants 🔗
• Just-In-Time (JIT) channels
  • LDK #2715 allows accepting underfunded HTLCs in support of JIT channel creation 🔗
• Large channels
  • Core Lightning #6783 deprecates the large-channels conf option, making them always enabled 🔗
• Liquidity advertisements
  • Discussion about proposed updates to the liquidity advertisements protocol 🔗
• LNURL
  • Discussion about offers-compatible Lightning addresses 🔗
• Miniscript
  • Field Report: A Miniscript Journey 🔗
• OP_CAT
  • Comments on draft BIP for OP_CAT 🔗

October 2023

• Replace-by-fee (RBF)
  • Replacement cycle attacks on HTLCs 🔗
  • Proposal for miners to automatically retry previously replaced transactions 🔗
  • Recommendation to RBF fee bump pre-signed transactions with more pre-signed transactions 🔗
  • Summary of well-known behavior for wallets to avoid when creating multiple replacements 🔗
• AssumeUTXO
  • Bitcoin Core #27596 adds assumedvalid snapshot chainstate and full validation sync in the background 🔗
  • Bitcoin Core bug found in computation of UTXO set hash 🔗
• Covenants
  • Draft BIP specification for OP_TXHASH proposed 🔗
  • Research into minimal opcodes for output script introspection to enable covenants 🔗
• Hash Time Locked Contract (HTLC)
  • Replacement cycle attacks on HTLCs 🔗
  • OP_EXPIRE opcode proposed that may help mitigate transaction pinning of HTLCs 🔗
• Transaction pinning
  • Replacement cycle attack against HTLCs creating pinning-like problems 🔗
  • OP_EXPIRE opcode proposed that may help mitigate transaction pinning of HTLCs 🔗
• Accountable Computing Contracts
  • BitVM: payments contingent on arbitrary computation without consensus changes 🔗
• CLTV expiry delta
  • Longer CLTV expiry deltas as a mitigation against replacement cycling attacks 🔗
• Compact block filters
  • LND v0.17.0-beta released with improved compact block filter speed through batched downloading 🔗
• Duplex micropayment channels
  • Pooled liquidity for LN using duplex micropayment channels 🔗
• Miniscript
  • Bitcoin Core #27255 ports miniscript to tapscript, providing tapscript descriptors 🔗
• Multipath payments
  • Dynamic Payment Switching and Splitting (PSS) proposed for improved payment privacy 🔗
• MuSig
  • Proposed BIP for MuSig2 fields in PSBTs 🔗
• OP_CAT
  • Proposed BIP for OP_CAT 🔗
• Output script descriptors
  • Bitcoin Core #27255 ports miniscript to tapscript, providing tapscript descriptors 🔗
• Package relay
  • Bitcoin Core #27609 makes the submitpackage RPC available on non-regtest networks 🔗
• Payment probes
  • Dynamic Payment Switching and Splitting (PSS) proposed to thwart Balance Discovery Attacks 🔗
• Partially signed bitcoin transactions
  • Proposed BIP for MuSig2 fields in PSBTs 🔗
• Rendez-vous routing
  • LND #7267 makes it possible to create routes to blinded paths 🔗
• Replacement cycling
  • Replacement cycling vulnerability against HTLCs with deployed and proposed mitigations 🔗
• Responsible disclosures
  • Antoine Riard responsibly discloses replacement cycle attacks affecting all HTLC-using software 🔗
• Taproot
  • LND v0.17.0-beta ships with experimental support for taproot and MuSig2 LN channels 🔗
• Tapscript
  • Research showing effect of OP_SUCCESSx on covenants using output script introspection 🔗
• Transaction origin privacy
  • Replacement cycle mitigation of frequent transaction rebroadcasting with potential privacy reduction 🔗
• Unannounced channels
  • LND v0.17.0-beta ships with experimental support for unannounced taproot and MuSig2 LN channels 🔗
• Version 2 P2P transport
  • Bitcoin Core #28331 adds optional support for v2 encrypted P2P transport 🔗
• Version 3 transaction relay
  • Replacement cycle attacks not solved by current v3 transaction relay policies 🔗

September 2023

• Version 2 P2P transport
  • Bitcoin Core PR Review Club summary about internal serialization changes for BIP324 🔗
  • Bitcoin Core #28196 adds a substantial portion of the code to provide BIP324 support 🔗
• Ark
  • Improving LN scalability with covenants in a similar way to Ark 🔗
• Channel factories
  • Using covenants to improve LN scalability through extremely efficient channel factories 🔗
• Client-side validation
  • Specifications published for taproot assets 🔗
• Coin selection
  • Bitcoin Core #26152 now pays any fee deficit for unconfirmed outputs chosen by coin selection 🔗
• Covenants
  • Using covenants like OP_CTV and APO to improve LN scalability 🔗
• Eltoo
  • Using eltoo-compatible covenants to improve LN scalability 🔗
• Expiration floods
  • Concern about forced expiration spam in very large channel factories 🔗
• LN-Penalty
  • Using covenants to improve LN scalability (compatible with LN-Penalty) 🔗
• Miniscript
  • Bitcoin Core #26567 computes input weight for fee estimation using miniscript and descriptors 🔗
• MuSig
  • LND #7994 adds RPC support for remote signing with the MuSig2 protocol 🔗
• Offers
  • LDK #2371 adds support for managing payments using offers 🔗
• OP_CHECKTEMPLATEVERIFY
  • Using covenants like OP_CTV and APO to improve LN scalability 🔗
• Payment probes
  • LDK #2534 adds additional support for pre-payment probing 🔗
• Point Time Locked Contracts (PTLCs)
  • Summary of proposed LN messaging changes for PTLCs 🔗
• Rendez-vous routing
  • LDK #2413 adds support for sending and receving payments with blinded paths 🔗
• SIGHASH_ANYPREVOUT
  • Using covenants like OP_CTV and APO to improve LN scalability 🔗
• Simple taproot channels
  • Specifications for taproot assets released based on LND’s experimental simple taproot channels 🔗
• Testnet
  • Bitcoin Core #28354 begins rejecting non-standard transactions by default on testnet 🔗
• Threshold signature
  • Idea for privacy enhanced transaction cosigning using FROST 🔗
• Timeout trees
  • Using covenants to improve LN scalability via timeout trees 🔗

August 2023

• MuSig
  • Discussion about blind MuSig2 signing for statechains 🔗
  • Field Report: Implementing MuSig2 by Brandon Black from BitGo 🔗
  • LND #7904 adds experimental support for taproot channels based on MuSig2 🔗
• OP_CHECKSIGFROMSTACK
  • Fraud proofs for outdated backup state enforcable onchain with OP_CSFS + OP_CAT 🔗
  • Mashup of OP_CTV and APO proposed using OP_CSFS and OP_TXHASH 🔗
• Responsible disclosures
  • Milk Sad team disclosed CVE-2023-39910 insecure entropy in Libbitcoin bx command 🔗
  • Matt Morehouse disclosed fake channels vulnerability against four major LN node implementations 🔗
• Silent payments
  • Bitcoin Core PR Review Club summary of #28122 adding silent payments 🔗
  • Proposal to add expiration metadata to silent payment addresses 🔗
• Splicing
  • Eclair #2680 adds quiescence negotiation for splicing 🔗
  • Core Lightning #6253 and #5675 add an experimental implementation of splicing 🔗
• Channel jamming attacks
  • DoS protection design philosophy and example of forward commitment fees and reverse hold fees 🔗
• Codex32
  • Core Lightning #6466 and #6473 add support for backing up and restoring codex32-encoded seeds 🔗
• Covenants
  • Mashup of OP_CTV and APO proposed using OP_CSFS and OP_TXHASH 🔗
• CVEs (various)
  • Milk Sad team disclosed CVE-2023-39910 insecure entropy in Libbitcoin bx command 🔗
• Ecash
  • Discussion of ecash in the context of blind MuSig2 signing 🔗
• Eclipse attacks
  • Bitcoin Core #27213 will attempt to open and maintain one connection on each reachable network 🔗
• Generic signmessage
  • Sparrow 1.7.8 adds support for BIP322 generic signmessage 🔗
• HTLC endorsement
  • HTLC endorsement testing and data collection 🔗
• LN-Penalty
  • Proposal for fraud proofs for providing outdated backup states to make LN-Penalty safer 🔗
• MATT
  • What opcodes are part of the MATT proposal? 🔗
• Onion messages
  • BOLTs #759 adds support for onion messages to the LN specification 🔗
• OP_CHECKTEMPLATEVERIFY
  • Mashup of OP_CTV and APO proposed using OP_CSFS and OP_TXHASH 🔗
• Payjoin
  • Discussion about draft BIP for serverless payjoin 🔗
• Peer storage
  • Fraud proofs for outdated state compared to peer storage backups 🔗
• Rendez-vous routing
  • LDK #2411 and #2412 add an API for constructing payment paths for blinded payments 🔗
• Replace-by-fee (RBF)
  • Proposal to enable full-RBF by default 🔗
• SIGHASH_ANYPREVOUT
  • Mashup of OP_CTV and APO proposed using OP_CSFS and OP_TXHASH 🔗
• Simple taproot channels
  • LND #7904 adds experimental support for simple taproot channels 🔗
• Statechains
  • Discussion about blind MuSig2 signing for statechains 🔗
• Threshold signature
  • Experimental implementation of FROST announced 🔗
• Trimmed HTLC
  • BOLTs #919 suggests nodes stop accepting additional trimmed HTLCs beyond a certain value 🔗
• Uneconomical outputs
  • BOLTs #919 suggests LN nodes limit their maximum exposure to uneconomical HTLCs 🔗
• Utreexo
  • Libflorestra library announced for using utreexo in applications 🔗
• Version 2 P2P transport
  • Bitcoin Core #28008 adds encryption and decryption routines for v2 transport protocol encryption 🔗
• Watchtowers
  • LDK #2337 makes it easier to use LDK for building watchtowers 🔗

July 2023

• Cluster mempool
  • Mempool proposals, including cluster mempool 🔗
  • LN developer discussion about multiple relay policy topics, including cluster mempool 🔗
• Anchor outputs
  • Core Lightning #6334 updates and expands CLN’s experimental support for anchor outputs 🔗
• Anonymity networks
  • Bitcoin Core #27411 stops announcing the local node’s Tor or I2P address on other networks 🔗
• Channel announcements
  • LN developer discussion about updated channel announcements 🔗
• Channel jamming attacks
  • LN developer discussion about channel jamming attacks 🔗
• CLTV expiry delta
  • LND #7768 implements BOLTs #1032 and #1063, allowing accepting a longer expiry than requested 🔗
• Codex32
  • Question about hand-derivation of public keys from private keys 🔗
• Discreet Log Contracts (DLCs)
  • Wallet 10101 allows pooling funds between LN and DLCs 🔗
• Ephemeral anchors
  • LN developer discussion about multiple relay policy topics, including ephemeral anchors 🔗
• HTLC endorsement
  • LN developer discussion about channel jamming attacks and HTLC endorsement 🔗
• MuSig
  • Taproot and MuSig2 LN channels 🔗
• Output script descriptors
  • BIPs #1354 adds BIP389 for multiple derivation path descriptors 🔗
• Package relay
  • LN developer discussion about multiple relay policy topics, including package relay 🔗
• Payjoin
  • Payjoin Dev Kit (PDK) announced to provide a Rust SDK for payjoin 🔗
• Redundant overpayments
  • LN developer discussion about protocol changes to support redundant overpayments 🔗
• Replace-by-fee (RBF)
  • Question about whether 0 OP_CSV forces the spending transaction to signal BIP125 replaceability? 🔗
• Side channels
  • Libsecp256k1 #1313 tests compiler prebuilds to detect unwanted optimization of constant-time code 🔗
• Splicing
  • Phoenix wallet adds splicing support 🔗
• Taproot
  • Taproot and MuSig2 LN channels 🔗
• Version 3 transaction relay
  • LN developer discussion about multiple relay policy topics, including v3 transaction relay 🔗
• Wallet labels
  • BIPs #1452 updates BIP329 with a new optional spendable tag 🔗

June 2023

• Channel jamming attacks
  • Eclair #2701 now records HTLC receive and settlement times to help with channel jamming mitigation 🔗
  • LND #7710 allows retrieving extra data about an HTLC in support of jamming countermeasures 🔗
• Coinjoin
  • Discussion about risks for coinjoin-style protocols of relaying taproot annexes 🔗
  • Preventing coinjoin pinning with v3 transaction relay 🔗
• HTLC endorsement
  • Eclair #2701 now records HTLC receive and settlement times to help later testing of HTLC endorsement 🔗
  • LND #7710 allows retrieving extra data about an HTLC in support of trying HTLC endorsement 🔗
• Just-In-Time (JIT) channels
  • Proposal to extend BOLT11 invoices to allow requesting prepayment for submarine swaps 🔗
  • LDK #2319 allows underfunding HTLCs in support of JIT channel creation 🔗
• Rendez-vous routing
  • LND #7710 adds the ability to retrieve extra data about an HTLC in support of route blinding 🔗
  • LDK #2120 adds support for finding a route to a receiver who is using blinded paths 🔗
• Anchor outputs
  • LDK #2368 allows manually accepting new channels created by a peer that use anchor outputs 🔗
• Annex
  • Discussion about the taproot annex 🔗
• CLTV expiry delta
  • Eclair #2677 raises its max_cltv to 2,016 blocks due widespread increases in CLTV expiry deltas 🔗
• Dual funding
  • LDK #2077 refactors code to make it easier later to add support for dual funded channels 🔗
• Eltoo
  • Discussion about the use of the annex field in LN-symmetry 🔗
• Joinpools
  • Example of using the MATT proposal plus OP_CAT to manage joinpools 🔗
• MATT
  • Using MATT to replicate CTV and manage joinpools 🔗
• Multipath payments
  • LDK #2156 adds support for keysend payments that use simplified multipath payments 🔗
• Onion messages
  • LDK #2294 adds support for replying to onion messages 🔗
• OP_CAT
  • Example of using the MATT proposal plus OP_CAT to manage joinpools 🔗
• OP_CHECKTEMPLATEVERIFY
  • Example of using MATT-style covenants to replicate CTV features 🔗
• Payment secrets
  • LDK #2156 adds support for multipath keysend payments, which require payment secrets 🔗
• Sidechains
  • Speculatively using hoped-for consensus changes to create two-way pegs for sidechains 🔗
• Silent payments
  • Draft BIP for silent payments 🔗
• Spontaneous payments
  • LDK #2156 adds support for keysend payments that use simplified multipath payments 🔗
• Submarine swaps
  • Proposal to extend BOLT11 invoices to allow requesting prepayment for submarine swaps 🔗
• Transaction pinning
  • Preventing coinjoin pinning with v3 transaction relay 🔗
• Version 2 P2P transport
  • Libsecp256k1 #1129 implements the ElligatorSwift technique for establishing v2 P2P connections 🔗
• Vaults
  • Discussion about storing vault-related data in taproot annexes 🔗
• Version 3 transaction relay
  • Preventing coinjoin pinning with v3 transaction relay 🔗

May 2023

• Covenants
  • Analysis of alternative design for OP_VAULT using MATT-style covenants 🔗
  • Proposed joinpool construction for Ark could be less interactive with covenants 🔗
• Dual funding
  • Challenges with zero-conf channels when dual funding 🔗
  • LDK #1794 begins adding support for dual funding 🔗
• MuSig
  • Munstr wallet performing MuSig2 communication using the nostr protocol 🔗
  • Lightning Lab’s Loop now uses MuSig2 by default for lower fees and improved privacy 🔗
• Package relay
  • Summaries of Bitcoin Core developers in-person meeting 🔗
  • Suggestion to perform package relay using Nostr protocol 🔗
• Partially signed bitcoin transactions
  • Bitcoin Core #25939 allows nodes with txindex enabled to add txs with utxoupdatepsbt RPC 🔗
  • Bitcoin Core #25796 adds a new descriptorprocesspsbt RPC for updating a PSBT 🔗
• Wallet labels
  • BIPs #1412 updates BIP329 wallet label export with support for key origin information 🔗
  • Nunchuk wallet adds BIP329 wallet label export 🔗
• Adaptor signatures
  • Analysis of signature adaptor security 🔗
• Anchor outputs
  • LDK #1841 implements a solution for the fee-stealing attack described in BOLTs #824 🔗
• Ark
  • Proposal for a managed joinpool protocol 🔗
• AssumeUTXO
  • Summaries of Bitcoin Core developers in-person meeting 🔗
• Channel announcements
  • LDK #2222 allows accepting gossip without verifying it first 🔗
• Channel jamming attacks
  • Testing HTLC endorsement for preventing channel jamming attacks 🔗
• Cluster mempool
  • Bitcoin Core meeting transcript about mempool redesign 🔗
• Coin selection
  • Bitcoin Core #27021 adds interface for calculating an output’s ancestor fee deficit 🔗
• Compact block relay
  • Bitcoin Core #27626 allows parallel download of compact blocks from multiple peers 🔗
• HD key generation
  • ColdCard 6.0.0X adds support for BIP129 exchange of xpubs during multisig wallet set up 🔗
• HTLC endorsement
  • Testing HTLC endorsement for preventing channel jamming attacks 🔗
• Just-In-Time (JIT) channels
  • Request for feedback on proposed specifications for LSPs, including LSPS2: JIT channels 🔗
• Joinpools
  • Proposal for Ark, a managed joinpool protocol 🔗
• MATT
  • MATT-based vaults 🔗
• Merkle tree vulnerabilities
  • Bitcoin Core #27608 protects against an invalidity caching vulnerability 🔗
• Miniscript
  • MyCitadel v1.3.0 adds more advanced support for miniscript 🔗
• Scriptless multisignatures
  • Analysis of signature adaptor security when used with multisignatures 🔗
• OP_CAT
  • Ark proposal would benefit from OP_CAT and OP_CHECKSIGFROMSTACK 🔗
• OP_CHECKTEMPLATEVERIFY
  • Analysis of alternative design for OP_VAULT using MATT-style covenants and CTV 🔗
• Out-of-band fees
  • Improvements to features for miners that accept out-of-band fees 🔗
• Payjoin
  • Advanced payjoin applications, including transaction cut-through 🔗
• Schnorr signatures
  • BIPs #1446 makes a small change and a number of additions to the BIP340 specification 🔗
• Signet
  • Mutinynet launches a signet with 30 second block times and hosted infrastructure tools 🔗
• Silent payments
  • Summaries of Bitcoin Core developers in-person meeting 🔗
• Timeout trees
  • Proposal for a managed joinpool protocol (Ark) 🔗
• Utreexo
  • ZeroSync protocol which uses a variation of utreexo 🔗
• Vaults
  • Analysis of alternative design for OP_VAULT using MATT-style covenants 🔗
• Zero-conf channels
  • Challenges with zero-conf channels when dual funding 🔗

April 2023

• Splicing
  • Splicing specification discussion about relative amounts and minimizing redundant data 🔗
  • Eclair #2584 adds support for both splice-in and splice-out 🔗
• Watchtowers
  • Watchtower accountability proofs 🔗
  • LND #7069 allows a client to ask its watchtower to delete a session 🔗
• Channel announcements
  • LDK #2198 increases the amount of time before gossiping that a channel is down 🔗
• Client-side validation
  • Update on RGB 🔗
• Child pays for parent (CPFP)
  • Suggested best practices for CPFP or RBF fee-bumping a previous CPFP fee bump 🔗
• Ephemeral anchors
  • Bitcoin Inquisition #23 adds part of the support for ephemeral anchors 🔗
• Scriptless multisignatures
  • BIPs #1372 assigns BIP327 to the MuSig2 protocol for creating multisignatures 🔗
• MuSig
  • BIPs #1372 assigns BIP327 to the MuSig2 protocol for creating multisignatures 🔗
• Pooled mining
  • Stratum v2 reference implementation update announced 🔗
• Proof of payment
  • BTCPay Server #4782 adds proof of payment on the receipt page for each payment 🔗
• Rendez-vous routing
  • BOLTs #765 adds route blinding to the LN specification 🔗
• Replace-by-fee (RBF)
  • Suggested best practices for CPFP or RBF fee-bumping a previous CPFP fee bump 🔗
• Side channels
  • Libsecp256k1 0.3.1 fixes a timing side-channel vulnerability 🔗
• Transaction bloom filtering
  • Proposal to remove mempool message support from Bitcoin Core, possibly along with bloom filters 🔗
• Transaction pinning
  • Question about how to pin a transaction by requiring a fee bump pay a 500x fee 🔗
• Wallet labels
  • BTCPay Server #4799 allows export wallet labels as specified in BIP329 🔗

March 2023

• Codex32
  • Partial checksum verification of codex32-encoded seeds 🔗
  • BIPs #1425 assigns BIP93 to the codex32 seed backup, splitting, verification, and recovery scheme 🔗
• Soft fork activation
  • PR Review Club meeting about Heretical Deployments used in Bitcoin Inquisition 🔗
  • Question about why Bitcoin Core hasn’t buried the taproot deployment 🔗
• Annex
  • Bitcoin Inquisition #22 adds an -annexcarrier runtime option 🔗
• AssumeUTXO
  • Bitcoin Core #25740 allows background validation of bootstrapped UTXO state 🔗
• Channel factories
  • Improving capital efficiency with multiparty channels in tunable penality channel factories 🔗
• Covenants
  • Proposal for alternative design for OP_VAULT inspired by OP_TLUV 🔗
• HD key generation
  • Faster offline verification of BIP32 master seed backups 🔗
• Offers
  • LDK #1977 allows serializing and deserializing offers 🔗
• Testnet
  • Service bit for Utreexo set for testing on testnet and signet 🔗
• Utreexo
  • Service bit for Utreexo 🔗
• Vaults
  • Proposal for alternative design for OP_VAULT inspired by OP_TLUV 🔗
• Watchtowers
  • Description of efficient watchtower use in the tunable penalty protocol 🔗

February 2023

• Channel jamming attacks
  • Summary of call about mitigating LN jamming 🔗
  • Feedback requested on LN good neighbor scoring for local reputation to mitigate jamming 🔗
• Dual funding
  • Core Lightning #5670 and #5956 make various updates to its implementation of dual funding 🔗
  • Eclair #2596 limits the number of RBF fee bumps in a dual funded channel open 🔗
• HTLC endorsement
  • Summary of call about mitigating LN jamming 🔗
  • Feedback requested on HTLC endorsement to mitigate jamming 🔗
• Offers
  • Core Lightning #5892 updates CLN’s implementation of the offers protocol 🔗
  • Eclair #2479 adds support for paying offers 🔗
• Payjoin
  • Serverless payjoin proposal 🔗
  • BTCPay Server #4600 updates its payjoin implementation to avoid creating unnecessary inputs 🔗
• Proof of payment
  • LN async proof of payment 🔗
  • Safety notes about CLN signinvoice RPC providing false proof of payment when misused 🔗
• Splicing
  • Eclair #2540 makes backend preparations for splicing 🔗
  • Eclair #2595 continues the project’s work on adding support for splicing 🔗
• Spontaneous payments
  • Eclair #2573 begins accepting keysend payments that don’t contain a payment secret 🔗
  • LDK #2002 adds support for automatically resending spontaneous payments 🔗
• Adaptor signatures
  • Using signature adaptors to prove acceptance of an LN async payment 🔗
• Anchor outputs
  • LDK #1860 adds support for channels using anchor outputs 🔗
• Async payments
  • Using adaptor signatures to prove an async payment was accepted 🔗
• Codex32
  • Proposed BIP for new codex32 seed backup, splitting, verification, and recovery scheme 🔗
• Coin selection
  • BTCPay Server #4600 updates its coin selection to avoid unnecessary inputs for payjoin 🔗
• Miniscript
  • Bitcoin Core #24149 adds signing support for P2WSH-based miniscript-based output descriptors 🔗
• Multipath payments
  • Discussion about using multipath overpayment with recovery to decrease payment latency 🔗
• MuSig
  • LND #7171 upgrades the signrpc RPC to support the latest draft BIP for MuSig2 🔗
• Output script descriptors
  • Bitcoin Core #24149 adds signing support for P2WSH-based miniscript-based output descriptors 🔗
• Peer storage
  • Core Lightning #5361 adds experimental support for peer storage backups 🔗
• Point Time Locked Contracts (PTLCs)
  • Using signature adaptors with PTLCs to prove acceptance of an LN async payment 🔗
• Redundant overpayments
  • Using redundant overpayments instead of a quality-of-service flag 🔗
• Replace-by-fee (RBF)
  • Bitcoin Core #25344 updates the fee-bumping RPCs to allow altering replacement outputs 🔗
• Stateless invoices
  • LDK #1878 encodes CLTV delta in payment secret for its stateless invoices 🔗
• Static channel backups
  • Core Lightning #5361 adds experimental support for peer storage backups 🔗
• Tapscript
  • Description of tapscript signature malleability and proposed fix for SIGHASH_ANYPREVOUT 🔗
• Vaults
  • Draft BIP available for OP_VAULT and OP_UNVAULT opcodes 🔗
• Wallet labels
  • Sparrow’s 1.7.2 release adds BIP329 import and export 🔗

January 2023

• Async payments
  • Eclair #2464 adds a trigger useful for allowing one node to deliver an async payment to a peer 🔗
  • Idea for non-interactive channel open commitments may allow fast rebalancing for async payments 🔗
  • Request for proof that an async payment was accepted 🔗
• BLS signatures
  • Question about schnorr signatures versus BLS signatures 🔗
• Covenants
  • Proposal for OP_VAULT and OP_UNVAULT opcodes to enable convenant-based valuts 🔗
• Discreet Log Contracts (DLCs)
  • Proposal for vault-enabling opcodes could also make DLCs much more efficient 🔗
• Ephemeral anchors
  • Ephemeral anchors compared to SIGHASH_GROUP 🔗
• Hardware wallet interface (HWI)
  • Bitcoin Core #21576 allows wallets using an external signer to RBF fee bump 🔗
• Offers
  • LDK #1738 and #1908 provide additional features for handling offers 🔗
• OP_CHECKTEMPLATEVERIFY
  • Proposal for OP_UNVAULT opcode that can emulate CTV 🔗
• Payment batching
  • Proposal for OP_VAULT opcode supports batching vault withdrawals 🔗
• Proof of payment
  • Request for proof that an async payment was accepted 🔗
• Rendez-vous routing
  • Eclair #2482 allows sending payments using blinded routes 🔗
• Replace-by-fee (RBF)
  • Continued RBF discussion, including number of full-RBF nodes, RBF-FSS, and RBF motivation 🔗
• Signet
  • Question about why signet uses the same bech32 address prefix as testnet 🔗
• Testnet
  • Question about why both testnet and signet use the tb1 bech32 address prefix? 🔗
• Vaults
  • Proposal for OP_VAULT and OP_UNVAULT opcodes 🔗
• Wallet labels
  • BIPs #1383 assigns BIP329 to the proposal for a standard wallet label export format 🔗

December 2022

• Channel jamming attacks
  • CircuitBreaker add-on software to partly mitigate jamming attacks without protocol changes 🔗
  • 2022 year-in-review: channel jamming 🔗
• Replace-by-fee (RBF)
  • Website to monitor unsignaled transaction replacements 🔗
  • 2022 year-in-review: replace-by-fee 🔗
• Version 3 transaction relay
  • Ephemeral anchors implementation as proposed extension to v3 transaction relay policy 🔗
  • 2022 year-in-review: v3 transaction relay 🔗
• Anchor outputs
  • Implementation of ephemeral anchors built on v3 transactions 🔗
• Async payments
  • 2022 year-in-review: async payments 🔗
• Channel factories
  • Proposed new channel construction to improve compatibility with channel factories 🔗
• Dual funding
  • 2022 year-in-review: interactive and dual funding 🔗
• Ephemeral anchors
  • Ephemeral anchors implementation 🔗
• Fee sponsorship
  • 2022 year-in-review: fee sponsorship 🔗
• HTLC endorsement
  • 2022 year-in-review: HTLC endorsement for channel jamming 🔗
• Just-In-Time (JIT) channels
  • LDK #1835 adds a SCID namespace for intercepted HTLCs allowing LSPs to open a JIT channel 🔗
• Just-in-time (JIT) routing
  • LDK #1835 adds support for JIT channel opens by LN service providers 🔗
• LN-Penalty
  • Factory-optimized LN protocol compared to LN-Penalty 🔗
• Miniscript
  • 2022 year-in-review: miniscript descriptors in Bitcoin Core 🔗
• MuSig
  • 2022 year-in-review: MuSig2 🔗
• Onion messages
  • 2022 year-in-review: onion messages 🔗
• Output script descriptors
  • 2022 year-in-review: miniscript descriptors in Bitcoin Core 🔗
• Package relay
  • 2022 year-in-review: package relay 🔗
• Quantum resistance
  • 2022 year-in-review: quantum-safe key exchange 🔗
• Reproducible builds
  • New website to monitor the current status of various Bitcoin project’s reproducible builds 🔗
• Silent payments
  • 2022 year-in-review: silent payments 🔗
• Stateless invoices
  • 2022 year-in-review: stateless invoices 🔗
• Transaction pinning
  • Implementation of proposed ephemeral anchors to help prevent pinning attacks 🔗
• Version 2 P2P transport
  • 2022 year-in-review: encrypted v2 transport protocol 🔗
• Zero-conf channels
  • 2022 year-in-review: zero-conf channels 🔗

November 2022

• Channel jamming attacks
  • Paper suggesting solutions to jamming attacks based on local reputation and upfront fees 🔗
  • Reputation credentials proposal to mitigate LN jamming attacks 🔗
• Offers
  • Core Lightning #5646 updates the implementation of offers to remove x-only public keys 🔗
  • Eclair #2499 allows specifying a blinded route to use when using a BOLT12 offer 🔗
• Partially signed bitcoin transactions
  • Rust Bitcoin #957 adds an API for signing PSBTs 🔗
  • LND #7122 adds support for importing PSBTs from binary files 🔗
• Replace-by-fee (RBF)
  • Discussion about mempoolfullrbf option’s effect on mempool consistency 🔗
  • Continued discussion about enabling full-RBF in Bitcoin Core 🔗
• X-only public keys
  • Core Lightning #5646 updates the experimental implementation of offers to remove x-only public keys 🔗
  • Libsecp256k1 #993 includes in the default build options a modules for working with x-only pubkeys 🔗
• Accountable Computing Contracts
  • Proposal for general smart contracts in Bitcoin via covenants 🔗
• Anchor outputs
  • Proposal to use multiple pre-committed fees to avoid needing anchor outputs in many cases 🔗
• CLTV expiry delta
  • Eclair #2468 implements BOLTs #1032, allowing accepting a longer expiry than requested 🔗
• Compact block filters
  • Bitcoin Core #25957 improves the performance of wallet rescans using local block filters 🔗
• Compact block relay
  • Discussion about inconsistent mempools and how that could affect compact block relay 🔗
• Covenants
  • Proposal to use covenants and merkle trees to enable generalized smart contracts 🔗
• Child pays for parent (CPFP)
  • Suggestion for LN to provide an alternative to using CPFP for most HTLC fee bumping 🔗
• CVEs (various)
  • CVE-2017-12842: Bitcoin Core PR Review Club discussion about lowering min relayable tx size 🔗
• Erlay
  • Discussion about inconsistent mempools and how that could affect Erlay 🔗
• HTLC endorsement
  • Paper suggesting HTLC endorsement as part of a mitigation for jamming attacks 🔗
• Hardware wallet interface (HWI)
  • Bitcoin Core #23578 using HWI to add support for externally signing taproot keypath spends 🔗
• Low-r grinding
  • BDK #779 adds support for creating low-r signatures 🔗
• MATT
  • Proposal for general smart contracts in Bitcoin via covenants 🔗
• Merkle tree vulnerabilities
  • CVE-2017-12842: Bitcoin Core PR Review Club discussion about lowering min relayable tx size 🔗
• Multipath payments
  • BOLTs #1031 allows paying slightly more than the requested amount when using multipath 🔗
• Rendez-vous routing
  • Core Lightning #5646 adds support for forwarding blinded payments 🔗
• Responsible disclosures
  • Anthony Towns disclosed a DoS and potential funds loss bug in BTCD and LND 🔗
• Version 2 P2P transport
  • Request for feedback on message identifiers for v2 P2P encrypted transport 🔗
• Version 3 transaction relay
  • Comparing disabling non-replaceable transactions to disabling special v3 transaction relay rules 🔗

October 2022

• Replace-by-fee (RBF)
  • Proposal for relay of v3 transactions allows replacement 🔗
  • Concerns raised about configuration option allowing full replace by fee in Bitcoin Core 🔗
  • History of the term “full RBF” 🔗
  • Continued discussion about mempoolfullrbf option for enabling full RBF 🔗
• Package relay
  • New proposed v3 transactions designed for use with package relay 🔗
  • Suggest to use CPFP with package relay to address RBF-related free option problem 🔗
  • CoreDev.tech transcript of discussion about package relay and v3 transactions 🔗
• Block explorers
  • Idea to use transaction lookup servers to serve unused wallet addresses 🔗
  • Launch of block explorer with private information retrieval capability 🔗
• Ephemeral anchors
  • Proposed additional rules for v3 transaction relay to assist CPFP fee bumping 🔗
  • Ephemeral anchors 🔗
• Erlay
  • BIPs #1370 updates the BIP330 specification of Erlay 🔗
  • Bitcoin Core #23443 adds the sendtxrcncl negotiation message for Erlay 🔗
• Transaction pinning
  • Proposed relay of v3 transactions designed to avoid pinning attacks 🔗
  • Proposed ephemeral anchors to help mitigate pinning attacks 🔗
• Version 2 P2P transport
  • Update on BIP324 v2 encrypted transport protocol 🔗
  • CoreDev.tech discussion of v2 P2P encrypted transport proposal 🔗
• Version 3 transaction relay
  • Proposed new transaction relay policies designed for LN-penalty 🔗
  • Ephemeral anchors proposal built on v3 transaction relay proposal 🔗
• Addr v2
  • BTCD v0.23.2 adds support for addr v2 🔗
• Anchor outputs
  • Proposed relay of v3 transactions attempts to improve on anchor outputs 🔗
• Async payments
  • Eclair #2435 adds support for a basic form of async payments when trampoline relay is used 🔗
• Compact block filters
  • Bitcoin Core #23549 adds scanblocks RPC to scan local compact block filters 🔗
• Countersign
  • CoreDev.tech transcripts: v2 P2P encrypted transport and countersign 🔗
• Child pays for parent (CPFP)
  • Suggestion to use CPFP to address RBF-related free option problem 🔗
• CVEs (various)
  • CVE-2017-12842: discussion of lowering minimum relayable transaction size 🔗
• Dual funding
  • Eclair #2463 and #2461 increase robustness of RBF fee bumping interactive funding 🔗
• Fee sniping
  • CoreDev.tech transcript of discussion about fees and fee sniping 🔗
• Fee sponsorship
  • Proposed ephemeral anchors relay policy to implement sponsorship-like behavior 🔗
• LN-Penalty
  • Proposed new transaction relay policies designed for LN-penalty 🔗
• Merkle tree vulnerabilities
  • CVE-2017-12842: discussion of lowering minimum relayable transaction size 🔗
• MuSig
  • Disclosure of security vulnerability in MuSig2 as described in a draft BIP 🔗
• Output linking
  • Recommendations for unique address servers 🔗
• Pay-to-Contract (P2C) protocols
  • BIPs #1293 adds BIP372 Pay-to-contract tweak fields for PSBT 🔗
• Pooled mining
  • Transcript of developer discussion about Stratum v2 and Braidpool 🔗
• Partially signed bitcoin transactions
  • BIPs #1293 adds BIP372 for including Pay-to-contract tweak fields in a PSBT 🔗
• Sidechains
  • Validity rollups research showing how trustless sidechains may be possible 🔗
• SIGHASH_ANYPREVOUT
  • BIPs #1367 simplifies BIP118’s description of SIGHASH_ANYPREVOUT 🔗
• Silent payments
  • BIPs #1349 adds BIP351 for a payment protocol inspired by silent payments 🔗
• Soft fork activation
  • History of how various soft fork proposals were tested prior to activation 🔗
• Tapscript
  • Discussion about lowering tapscript resource limits 🔗
• Threshold signature
  • Transcripts of talks about the FROST and ROAST threshold signature schemes 🔗
• Trampoline payments
  • Eclair #2435 adds support for basic async payments for trampoline relay 🔗
• Uneconomical outputs
  • Discussion about allowing uneconomical outputs that are part of a transaction package 🔗
• Utreexo
  • Launch of ZeroSync project using Utreexo 🔗

September 2022

• SIGHASH_ANYPREVOUT
  • Creating drivechains with APO and a trusted setup 🔗
  • New software fork of Bitcoin Core for testing to include support for APO 🔗
• Anonymity networks
  • Bitcoin Core #25355 adds support for transient I2P addresses 🔗
• Channel announcements
  • LN fee rate cards proposed to reduce fee-related channel update gossip 🔗
• Compact block filters
  • LDK #1706 adds support for using compact block filters for downloading confirmed transactions 🔗
• Dual funding
  • Eclair #2406 allows requiring confirmed inputs in the interactive funding protocol 🔗
• Hardware wallet interface (HWI)
  • BDK #682 adds signing capabilities for hardware signing devices using HWI and rust-hwi 🔗
• Offers
  • Eclair #2416 adds support for receiving payments requested using the offers protocol 🔗
• OP_CHECKTEMPLATEVERIFY
  • New software fork of Bitcoin Core for testing to include support for CTV 🔗
• Rendez-vous routing
  • Eclair #2418 and #2408 add support for receiving payments sent with blinded routes 🔗
• Sidechains
  • Creating drivechains with APO and a trusted setup 🔗
• Uneconomical outputs
  • BDK #689 allows a wallet to create a transaction that violates the dust limit 🔗

August 2022

• Output script descriptors
  • BIP proposed to allow multiple derivation paths in a descriptor 🔗
  • Bitcoin Core #23480 adds a rawtr() descriptor 🔗
  • New descriptor proposed for silent payments 🔗
  • How partial descriptors could help create tapleaf trees 🔗
• Zero-conf channels
  • LND #6816 adds documentation about how to use zero-conf channels 🔗
  • Core Lightning 0.12 adds support for zero-conf channels 🔗
  • LND 0.15.1-beta adds support for zero-conf channels 🔗
• Dual funding
  • Eclair #2273 implements the proposed interactive funding protocol 🔗
  • Eclair #2275 completes experimental support for the dual funding protocol 🔗
• Onion messages
  • LDK #1503 adds support for onion messages 🔗
  • LDK #1652 adds support for onion message reply paths 🔗
• BLS signatures
  • Using Bitcoin-compatible BLS signatures for Discree Log Contracts (DLCs) 🔗
• Channel jamming attacks
  • Guide to channel jamming attacks and proposed solutions 🔗
• Coin selection
  • Bitcoin Core #24584 prefers input sets composed of a single output type for privacy 🔗
• Compact block relay
  • Rust Bitcoin #1088 adds structures and methods for compact blocks 🔗
• Default minimum transaction relay feerates
  • Discussion about lowering the default minimum transaction relay feerate 🔗
• Discreet Log Contracts (DLCs)
  • Using Bitcoin-compatible BLS signatures for DLCs 🔗
• HD key generation
  • BIP proposed to allow multiple BIP32 derivation paths in a descriptor 🔗
• Rendez-vous routing
  • Eclair #2253 adds support for relaying blinded payments 🔗
• Replace-by-fee (RBF)
  • Bitcoin Core #25610 opts-in the RPCs and -walletrbf to RBF by default 🔗
• Schnorr signatures
  • BDK #718 begins verifying schnorr signatures immediately after the wallet creates them 🔗
• Signet
  • Eclair #2387 adds support for signet 🔗
• Silent payments
  • Updated silent payments PR 🔗
• Splicing
  • BOLTs #1004 makes recommendations to support future detection of splices 🔗
• Static channel backups
  • Core Lightning 0.12 adds support for static channel backups 🔗
• Wallet labels
  • Proposed BIP for a wallet label export format 🔗

July 2022

• Fee sniping
  • BDK #611 begins using anti fee sniping by default 🔗
  • Discussion about fee sniping in relationship to block subsidy 🔗
• Payment probes
  • LDK #1555 now slightly prefers paying through channels which make balance probing harder 🔗
  • LDK #1567 adds support for a basic payment probing API 🔗
• Channel announcements
  • Core Lightning #5239 improves its gossip handling code 🔗
• Cross-input signature aggregation (CISA)
  • Draft BIP about half aggregation of BIP340 schnorr signatures 🔗
• Generic signmessage
  • Proposed BIP for multiformat single-sig message signing 🔗
• LNURL
  • BTCPay Server #3709 adds support for pull payments to be received via a LNURL withdraw 🔗
• Miniscript
  • Bitcoin Core #24148 adds watch-only support for descriptors containing miniscript 🔗
• Onion messages
  • Proposals to either rate limit or charge for onion messages 🔗
• Output linking
  • Updated alternative to BIP47 reusable payment codes 🔗
• Output script descriptors
  • Bitcoin Core #24148 adds watch-only support for descriptors containing miniscript 🔗
• Package relay
  • Bitcoin Core #24836 adds a regtest-only RPC, submitpackage, to help test package relay 🔗
• Partially signed bitcoin transactions
  • Bitcoin Core #22558 adds support for BIP371’s additional PSBT fields 🔗
• Replace-by-fee (RBF)
  • Bitcoin Core fullrbf setting where the node always allows transaction replacement 🔗
• Schnorr signatures
  • LND #6722 adds support for signing arbitrary messages with schnorr signatures 🔗
• Silent payments
  • Updated alternative to BIP47 reusable payment codes compared to silent payments 🔗
• Splicing
  • Discussion about the best way to gossip channel splices 🔗
• Tapscript
  • Question: why do invalid OP_CHECKSIGADD signatures fail their script? 🔗
• Uneconomical outputs
  • Question about problems removing uneconomical outputs from UTXO set 🔗
• X-only public keys
  • X-only workaround for covenant-based protocols 🔗

June 2022

• LNURL
  • Large size of blinded paths may make them dependent on invoice protocols like LNURL or offers 🔗
  • Dicussion about how to make LNURL and offers compatible 🔗
• Zero-conf channels
  • BOLTs #910 adds an option_zeroconf feature bit 🔗
  • LDK #1401 adds support for zero-conf channel opens 🔗
• Async payments
  • Trampoline routing and async mobile payments 🔗
• Channel announcements
  • LN developer meeting discussion about gossip updates 🔗
• Fee sniping
  • LDK #1531 begins using anti fee sniping for LN funding transactions 🔗
• Miniscript
  • PR Review Club about miniscript support for descriptors 🔗
• Scriptless multisignatures
  • Question about the largest multisig quorum possible with different script types 🔗
• MuSig
  • Discussion about designing LN upgrades to support recursive MuSig2 🔗
• Output linking
  • Experimentation with silent addresses 🔗
• Output script descriptors
  • PR Review Club about miniscript support for descriptors 🔗
• Package relay
  • Continued discussion of proposed package relay BIP 🔗
• Payment probes
  • LN developer meeting summary: probing and balance sharing 🔗
• Rendez-vous routing
  • Discussion about the need for LNURL or offers for effective blinded paths 🔗
• Replace-by-fee (RBF)
  • Discussion about enabling full replace by fee in Bitcoin Core (off by default) 🔗
• Taproot
  • Why P2TR outputs should use the noscript commitments when only keypath spending is desired 🔗
• Testnet
  • BOLTs #968 adds default TCP ports for nodes using Bitcoin testnet and signet 🔗
• Trampoline payments
  • Discussion about combining trampoline routing with first-hop payment holds 🔗

May 2022

• Covenants
  • When would enabling OP_CAT allow recursive covenants? 🔗
  • Updated OP_TX opcode useful for constructing covenants 🔗
  • Discussion about Miner Extractable Value (MEV) risk from recursive covenants 🔗
• MuSig
  • MuSig2 implementation notes 🔗
  • LND #6361 adds support for MuSig2 signing 🔗
• OP_CHECKTEMPLATEVERIFY
  • Proposal to initially restrict OP_TX to the features provided by OP_CTV 🔗
  • BIPs #1309 updates BIP119’s example implementation to use pythonic pseudocode 🔗
• Channel announcements
  • LN gossip rate limiting for use with Erlay-like set reconciliation 🔗
• Coin selection
  • What is the coin selection ‘waste metric’? 🔗
• Compact block relay
  • Bitcoin Core #20799 disables v1 compact block relay; v2 still enabled 🔗
• Child pays for parent (CPFP)
  • BIP proposed for package relay that can make CPFP bumping more reliable 🔗
• Eltoo
  • Using transaction introspection to prevent pinning in eltoo channels 🔗
• Large channels
  • LDK #1425 adds support for large channels 🔗
• Miniscript
  • Adapting descriptors and miniscript for hardware signing devices 🔗
• Minisketch
  • Research into interaction between LN rate limiting and minisketch gossiping 🔗
• OP_CAT
  • Examination of the minimal set of features added to OP_CAT that would create recursive covenants 🔗
• Output script descriptors
  • Adapting descriptors and miniscript for hardware signing devices 🔗
• Package relay
  • BIP proposed for package relay 🔗
• Partially signed bitcoin transactions
  • LND #6450 adds support for signing PSBTs that spend taproot outputs 🔗
• Responsible disclosures
  • Bastien Teinturier disclosed issue allowing funds loss from Core Lightning and LND 🔗
• Schnorr signatures
  • Why isn’t OP_CHECKMULTISIG compatible with batch verification of schnorr signatures? 🔗
• Soft fork activation
  • Proposal to use transaction signaling to measure support for consensus changes 🔗
• Taproot
  • LND #6450 adds support for signing PSBTs that spend taproot outputs 🔗
• Testnet
  • Bitcoin Core #18554 prevents the same wallet from being used on mainnet and testnet 🔗
• Transaction pinning
  • Idea to use transaction introspection to prevent RBF pinning 🔗

April 2022

• OP_CHECKTEMPLATEVERIFY
  • Discussion about activating CTV 🔗
  • Implications of bare CTV not having an address format 🔗
• Soft fork activation
  • Discussion about when activating a soft fork is justified 🔗
  • Proposal for automatically reverting soft forks 🔗
• Stateless invoices
  • Core Lightning #5068 adds payer-side support for stateless invoices 🔗
  • LND #5810 implements sending support for payment metadata 🔗
• Channel commitment upgrades
  • Updating LN commitments 🔗
• Client-side validation
  • Taro transferrable token scheme 🔗
• Coinjoin
  • WabiSabi implemented in Wasabi 2.0 🔗
• Child pays for parent (CPFP)
  • Bitcoin Core #24152 begins accepting low-feerate transactions that are paid for by their children 🔗
• LNURL
  • C-Lightning #5121 updates its invoice RPC for improved LNURL compatibility 🔗
• Low-r grinding
  • LDK #1388 adds default support for creating low-r signatures 🔗
• Miniscript
  • Bitcoin Core #24147 adds backend support for miniscript 🔗
• MuSig
  • Proposed BIP for MuSig2 🔗
• Output linking
  • Silent addresses for delinked reusable addresses 🔗
• Payjoin
  • Tradeoffs of WabiSabi as an alternative to payjoin 🔗
• Quantum resistance
  • Discussion about quantum-safe key exchange 🔗
• SIGHASH_ANYPREVOUT
  • Request to activate a slightly modified APO instead of (or before) CTV 🔗
• Signet
  • Analysis of transactions on the CTV signet 🔗
• Silent payments
  • Silent payments proposed 🔗
• Spontaneous payments
  • LND #5414 begins advertising support for previously-implemented keysend payments 🔗
• Taproot
  • Bitcoin Core #23536 begins enforcing taproot on all blocks (except one) with segwit active 🔗
• Vaults
  • Proposal to use simple vaults as one benchmark for comparing different covenant designs 🔗

March 2022

• Covenants
  • Proposed OP_EVICT opcode to make covenants more efficient 🔗
  • Discussion about the risks of allowing recursive covenants 🔗
• Replace-by-fee (RBF)
  • Summary of recent proposed changes to RBF policy 🔗
  • Discussion about allowing transaction witness replacement without a fee bump 🔗
• Basic Bitcoin Lisp Language (bll)
  • Suggestion to add a variation of Chia Lisp to Bitcoin as a new scripting language 🔗
• Channel announcements
  • Continued discussion about updated gossip proposal 🔗
• Channel factories
  • Proposed OP_EVICT opcode to make channel factories more efficient 🔗
• Coinswap
  • Teleport Transactions 0.1 implements routable coinswaps 🔗
• Child pays for parent (CPFP)
  • BTCPay Server 1.4.5 adds support for CPFP fee bumping 🔗
• Fee sniping
  • BIPs #1269 assigns BIP326 to a recommendation for default taproot anti fee sniping 🔗
• Joinpools
  • Proposed OP_EVICT opcode to make joinpools more efficient 🔗
• MuSig
  • Proposal to use MuSig2 in the LN gossip protocol 🔗
• Onion messages
  • Proposal to charge for onion message bandwidth 🔗
• OP_CHECKTEMPLATEVERIFY
  • Continued CTV discussion and the design for a CTV-based vault 🔗
• Output script descriptors
  • Bitcoin Core #24043 adds new multi_a and sortedmulti_a descriptors for taproot multisig 🔗
• Redundant overpayments
  • Speeding up payment delivery with algorithms and stuckless payments 🔗
• Sidechains
  • Opcodes enabling recursive covenants may also permit drivechains 🔗
• Simplicity
  • BTC-Script (based on Chia Lisp) as an alternative to Simplicity 🔗
• Soft fork activation
  • Concern about Speedy Trial activation for controversial soft forks 🔗
• Transaction pinning
  • Idea to prevent pinning by allowing transaction to signal that descendant limits 🔗
• Vaults
  • Design and code for a CTV-based vault 🔗
• Zero-conf channels
  • LDK #1311 adds support for SCID alias field useful for zero-conf channels 🔗

February 2022

• OP_CHECKTEMPLATEVERIFY
  • Discussion about how CTV or other covenant features could make DLCs much more efficient 🔗
  • OP_TXHASH as a proposed alternative to CTV and APO 🔗
  • Parameters published for OP_CHECKTEMPLATEVERIFY signet 🔗
• SIGHASH_ANYPREVOUT
  • Discussion about how APO or other covenant features could make DLCs much more efficient 🔗
  • OP_TXHASH as a proposed alternative to CTV and APO 🔗
• Channel announcements
  • Updated gossip proposal 🔗
• Covenants
  • Proposal for composable OP_TX opcode useful for constructing covenants 🔗
• Discreet Log Contracts (DLCs)
  • Discussion about how CTV or other covenant features could make DLCs much more efficient 🔗
• Fee sponsorship
  • Fee bumping discussion with advocacy for fee sponsorship 🔗
• Generic signmessage
  • BIPs #1279 updates BIP322 with clarifications and test vectors 🔗
• Minisketch
  • New LN gossip wire protocol proposal designed for use with minisketch 🔗
• OP_CHECKSIGFROMSTACK
  • Proposal for OP_TX opcode composable with OP_CHECKSIGFROMSTACK 🔗
• Proof of reserves
  • Kraken announces proof of reserves scheme 🔗
• Partially signed bitcoin transactions
  • HWI #549 adds support for PSBT version 2 🔗
• Replace-by-fee (RBF)
  • Discussion about RBF policy, including suggested changes 🔗
• Signet
  • Parameters published for OP_CHECKTEMPLATEVERIFY signet 🔗
• Stateless invoices
  • LDK #1199 uses stateless invoices to allow phantom node payments 🔗

January 2022

• Partially signed bitcoin transactions
  • Bitcoin Core #23718 adds support for displaying hashes and preimages contained in PSBTs 🔗
  • Bitcoin Core #17034 adds support for version 2 PSBTs and for preserving proprietary fields 🔗
  • Rust Bitcoin #681 adds support for BIP371’s additional PSBT fields for taproot 🔗
  • Rust Bitcoin #669 improves partial signature support with discussion about nulldummy vectors 🔗
  • BIPs #1270 updates the PSBT specification to discourage signature placeholders 🔗
• Onion messages
  • Eclair #2099 adds onion message configuration option for controling when to relay messages 🔗
  • Eclair #2117 adds onion message replies in preparation for supporting offers 🔗
  • Eclair #2133 begins relaying onion messages by default 🔗
• Stateless invoices
  • Rust-Lightning #1177 implements stateless payments using the payment secret field 🔗
  • BOLTs #912 adds a new optional field to BOLT11 invoices to enable stateless payments 🔗
  • Eclair #2063 adds support for the new option_payment_metadata invoice field 🔗
• OP_CHECKTEMPLATEVERIFY
  • Bi-weekly IRC meetings scheduled for reviewing and discussing OP_CHECKTEMPLATEVERIFY 🔗
  • Mailing list and IRC discussion of CTV, including criticism and rebuttals 🔗
• Anchor outputs
  • Eclair #2134 enables anchor outputs by default 🔗
• Bech32(m)
  • Bitcoin Core GUI #459 allows users to choose to create bech32m addresses 🔗
• Compact block filters
  • Bitcoin Core #17631 adds new REST endpoint for compact block filters 🔗
• Duplicate transactions
  • Description of Block 1,983,702 Problem added to testnet documentation 🔗
• Erlay
  • PR Review Club: #23443 implementing Erlay support signaling 🔗
• Fee estimation
  • ECDSA signature grinding helps with fee estimation 🔗
• Fee sponsorship
  • Fee accounts, an outgrowth from fee sponsorship 🔗
• LNURL
  • BTCPay Server #3083 allows administrators to log in using LNURL authentication 🔗
• Offers
  • Eclair #2117 adds onion message replies in preparation for supporting offers 🔗
• Output script descriptors
  • HWI #545 adds support for taproot tr() descriptors 🔗
• Package relay
  • Bitcoin Core #22674 adds logic for validating packages of transactions against relay policy 🔗
• Pay-to-Contract (P2C) protocols
  • PSBT extension for pay-to-contract fields 🔗
• Payment secrets
  • Rust-Lightning #1177 uses the payment secret field to store encrypted invoice information 🔗
• Replace-by-fee (RBF)
  • Proposal to briefly allow full RBF before using default opt-in RBF 🔗
• Taproot
  • Question: is it possible to convert a taproot address into a v0 native segwit address? 🔗
• Testnet
  • Bitcoin Core #23882 updates documentation about testnet3 to mention the BIP30 problem 🔗

December 2021

• Onion messages
  • C-Lightning #4921 updates the implementation of onion messages 🔗
  • Eclair #2061 adds initial support for onion messages 🔗
  • 2021 year-in-review: onion messages 🔗
• Bech32(m)
  • Bitcoin Core #16807 returns the location of typos in bech32/bech32m addresses 🔗
  • 2021 year-in-review: bech32m addresses 🔗
• Dual funding
  • 2021 year-in-review: dual-funded channels 🔗
  • 2021 year-in-review: liquidity advertisements 🔗
• Output script descriptors
  • Bitcoin Core #22364 adds support for creating taproot descriptors in the wallet 🔗
  • 2021 year-in-review: output script descriptors 🔗
• Point Time Locked Contracts (PTLCs)
  • Discussion about LN protocol changes necessary to support PTLCs 🔗
  • 2021 year-in-review: PTLCs for LN 🔗
• Replace-by-fee (RBF)
  • 2021 year-in-review: BIP125 opt-in replace-by-fee discrepency 🔗
  • 2021 year-in-review: default transaction replacement by fee 🔗
• Anchor outputs
  • Rust-Lightning #1176 adds initial support for anchor outputs-style fee bumping 🔗
• AssumeUTXO
  • Bitcoin Core #23155 extends the dumptxoutset RPC with new information 🔗
• Atomic multipath payments (AMPs)
  • 2021 year-in-review: atomic multipath payments 🔗
• Channel jamming attacks
  • 2021 year-in-review: channel jamming 🔗
• CPFP carve out
  • Research into alternatives to CPFP carve-out for fee bumping in multiparty contract protocols 🔗
• Hardware wallet interface (HWI)
  • HWI #475 adds support for the Blockstream Jade hardware signer 🔗
• Offers
  • 2021 year-in-review: offers 🔗
• Package relay
  • 2021 year-in-review: mempool package acceptance and package relay 🔗
• Proof of payment
  • LND adds support for AMP-based spontaneous payments, combining systems without proof of payment 🔗
• Partially signed bitcoin transactions
  • Bitcoin Core #22513 allows walletprocesspsbt to sign without finalizing 🔗
• SIGHASH_ANYPREVOUT
  • 2021 year-in-review: SIGHASH_ANYPREVOUT 🔗
• Signet
  • 2021 year-in-review: signet 🔗
• Soft fork activation
  • Analysis of treating taproot outputs as always usable post-activation 🔗
• Taproot
  • 2021 year-in-review: taproot 🔗
• Uneconomical outputs
  • Discussion about removing the dust limit for one particular case 🔗
• Zero-conf channels
  • 2021 year-in-review: zero-conf channel opens 🔗

November 2021

• Taproot
  • Expanded test vectors for taproot published 🔗
  • Taproot activated at block height 709,632 🔗
  • BIPs #1225 updates BIP341 with extended taproot test vectors 🔗
• Atomic multipath payments (AMPs)
  • LND #5803 allows multiple spontaneous payments to the same AMP invoice 🔗
  • LND 0.14.0-beta allows multiple spontaneous payments to the same AMP invoice 🔗
• Anonymity networks
  • Bitcoin Core #23077 enables address relay via CJDNS 🔗
• Bech32(m)
  • Rust Bitcoin #691 adds an API to create bech32m addresses for a P2TR scriptPubKey 🔗
• Channel jamming attacks
  • Summary of LN developer conference, including discussion of channel jamming attacks 🔗
• Compact block filters
  • Discussion of additional compact block filter verification 🔗
• Discreet Log Contracts (DLCs)
  • Mailing list post about DLCs over LN 🔗
• Eclipse attacks
  • LND 0.14.0-beta includes additional eclipse attack protection by sharing block headers 🔗
• Eltoo
  • Summary of LN developer conference, including discussion of eltoo 🔗
• MuSig
  • Summary of LN developer conference, including discussion of MuSig2 🔗
• Offers
  • Summary of LN developer conference, including discussion of offers 🔗
• Onion messages
  • Eclair #1957 adds basic support for onion messages 🔗
• OP_CHECKTEMPLATEVERIFY
  • BIPs #1215 makes several updates to the BIP119 OP_CHECKTEMPLATEVERIFY proposal 🔗
• Out-of-band fees
  • Discussion about submitting transactions directly to miners 🔗
• Point Time Locked Contracts (PTLCs)
  • Summary of LN developer conference, including discussion of PTLCs 🔗
• Redundant overpayments
  • LN summit 2021: stuckless payments 🔗
• Spontaneous payments
  • LND #5803 allows multiple spontaneous payments to the same invoice 🔗
• Testnet
  • Software incorrectly implementing compact block filtering failed on testnet 🔗
• Trampoline payments
  • Summary of LN developer conference, including discussion of trampoline payments 🔗
• Zero-conf channels
  • Rust-Lightning #1078 adds channel_type negotiation useful for zero-conf channels 🔗

October 2021

• Uneconomical outputs
  • Multiple implementations of BOLTs #894 which allow using a lower commitment tx dust limit 🔗
  • Multiple implementations of LN vulnerable to uneconomical spending CVEs 🔗
  • Bitcoin Core #22863 documents P2TR dust amount 🔗
  • BOLTs #894 specifies various checks related to uneconomical payments in LN 🔗
• Bech32(m)
  • Rust Bitcoin #563 adds support for bech32m addresses for P2TR outputs 🔗
  • Instructions for creating bech32m addresses in Bitcoin Core 🔗
• Eltoo
  • Inherited identifiers proposal with an alternative channel commiment mechanism to eltoo 🔗
  • LN PTLC proposal providing some of the same benefits of eltoo without a soft fork 🔗
• Output linking
  • Preparing for taproot: impact of a new output script on output linkability 🔗
  • Bitcoin Core #23065 allows the wallet to persistently prevent spending of spam UTXOs 🔗
• Output script descriptors
  • Coldcard 4.1.3 adds support for descriptor-based wallets 🔗
  • Bitcoin Core #23002 makes descriptor-based wallets the default for new wallets 🔗
• Point Time Locked Contracts (PTLCs)
  • Proposal to upgrade LN to use PTLCs 🔗
  • Using PTLCs for non-custodial offline receiving 🔗
• Taproot
  • Preparing for taproot: is cooperation always an option? 🔗
  • Taproot trivia: origins, naming, and related prior work 🔗
• Async payments
  • Paying offline nodes 🔗
• Channel factories
  • Inherited identifiers proposal with an alternative channel factory design 🔗
• Channel jamming attacks
  • Making jamming attacks more expensive by lowering the cost of probing 🔗
• Coin selection
  • Bitcoin Core #17526 adds Single Random Draw coin selection algorithm 🔗
• Coinjoin
  • Sparrow 1.5.0 adds coinjoin suport 🔗
• Fee estimation
  • Bitcoin Core #22539 includes replacement transactions seen by the local node in fee estimates 🔗
• Joinpools
  • Post-taproot soft fork ideas: OP_TAPLEAF_UPDATE_VERIFY 🔗
• Pay-to-Contract (P2C) protocols
  • Taproot history: pay to contract protocol 🔗
• Payment probes
  • Lowering the cost of probing to make attacks more expensive 🔗
• Partially signed bitcoin transactions
  • LND #5363 allows PSBTs to be finalized by external software 🔗
• SIGHASH_ANYPREVOUT
  • Inherited identifiers proposal as an alternative to SIGHASH_ANYPREVOUT 🔗
• Tapscript
  • Rust Bitcoin #644 adds support for tapscript’s new opcodes 🔗
• Testnet
  • Instructions for creating taproot transactions on testnet 🔗
• Timeout trees
  • New timeout trees idea for minimizing onchain data when channel factory users become unresponsive 🔗
• Vaults
  • Should vaults always have a cooperative taproot keypath spend? 🔗
• Watchtowers
  • Inherited identifiers proposal with alternative simplified watchtower design 🔗

September 2021

• Taproot
  • Updating LN for taproot: P2TR channels 🔗
  • BTCPay server #2830 adds support for P2TR receiving and spending 🔗
  • Specter v1.6.0 adds support for single-key taproot 🔗
  • Fully Noded v0.2.26 adds support for P2TR receiving and spending 🔗
• Anchor outputs
  • BOLTs #824 adds a variation on the anchor outputs protocol that prevents a fee-stealing attack 🔗
  • Eclair #1932 implements the zero HTLC fee anchor outputs protocol 🔗
  • Complications for HD wallet recovery in zero HTLC fee anchor outputs protocol 🔗
• Partially signed bitcoin transactions
  • BIP174.org simplifies decoding and modifying PSBTs 🔗
  • MIME type proposed for PSBTs 🔗
• Signet
  • Discussion about adding regular reorgs to the default signet 🔗
  • Preparing for taproot: testing on signet 🔗
• Vaults
  • Updating vaults for taproot 🔗
  • OP_TAPLEAF_UPDATE_VERIFY opcode proposed that would simplify some vault designs 🔗
• Anonymity networks
  • Bitcoin Core 22.0 adds support for I2P connections and removes v2 Tor connections 🔗
• Coin selection
  • Bitcoin Core #22009 introduces new heuristic to compare the effectiveness of coin selection results 🔗
• Compact block relay
  • Disabling compact block relay for -blocksonly nodes 🔗
• Covenants
  • OP_TAPLEAF_UPDATE_VERIFY opcode proposed with a taproot-native covenant design 🔗
• Child pays for parent (CPFP)
  • Proposal of initial CPFP rules for mempool package acceptance before implementing package relay 🔗
• Discreet Log Contracts (DLCs)
  • Discussion about DLC specification breaking changes 🔗
• Eltoo
  • Eltoo demo implementation with new blog post overview 🔗
• Generic signmessage
  • Preparing for taproot: generic signmessage still needed 🔗
• HD key generation
  • Complications for HD wallet recovery in zero HTLC fee anchor outputs protocol 🔗
• Hash Time Locked Contract (HTLC)
  • Updating LN for taproot: from HTLCs to PTLCs 🔗
• Joinpools
  • OP_TAPLEAF_UPDATE_VERIFY proposal to simplify covenant and joinpool implementation 🔗
• LNURL
  • Lightning Address identifiers announced based on LNURL 🔗
• Output script descriptors
  • BIPs #1143 introduces BIPs 380-386 specifying output script descriptors 🔗
• Package relay
  • Proposal of initial rules for mempool package acceptance before implementing package relay 🔗
• Pooled mining
  • Announcement of BraidPool, a P2Pool alternative 🔗
• Point Time Locked Contracts (PTLCs)
  • Updating LN for taproot: from HTLCs to PTLCs 🔗
• Replace-by-fee (RBF)
  • Proposal of initial RBF rules for mempool package acceptance before implementing package relay 🔗
• Responsible disclosures
  • Ajmal Aboobacker and Abdul Muhaimin disclose cross-site scripting vulnerabilities in BTCPay Server 🔗
• Stateless invoices
  • Stateless invoices to avoid tracking unused payment requests 🔗
• Transaction bloom filtering
  • Rust Bitcoin #580 adds support for the BIP37 P2P network messages 🔗

August 2021

• Scriptless multisignatures
  • Preparing for taproot: multisignature overview 🔗
  • Preparing for taproot: challenges with multisignature nonces 🔗
• Offers
  • C-Lightning 0.10.1 updates the experimental implementation of offers 🔗
  • Spark Lightning Wallet adds partial support for offers 🔗
• Uneconomical outputs
  • Discussion about removing the dust limit 🔗
  • Rust-Lightning #1009 adds a max_dust_htlc_exposure_msat channel configuration option 🔗
• Adaptor signatures
  • Preparing for taproot: signature adaptors 🔗
• Coinjoin
  • JoinMarket 0.9.0 released with implementation of fidelity bonds for coinjoin sybil resistance 🔗
• Dual funding
  • C-Lightning 0.10.1 updates the experimental implementation of dual funding 🔗
• Hash Time Locked Contract (HTLC)
  • Privacy problems with HTLCs 🔗
• Liquidity advertisements
  • Question: Will liquidity ads allow for third-party purchased liquidity (‘sidecar channels’)? 🔗
• Multipath payments
  • Discussion about the effect of base fees on multipath payment costs 🔗
• MuSig
  • Overview of MuSig1, MuSig2, and MuSig-DN 🔗
• Package relay
  • Bitcoin Core #21800 implements ancestor and descendant limits for mempool package acceptance 🔗
• Payment secrets
  • BOLTs #887 updates BOLT11 to require that spenders specify the payment secret 🔗
• Point Time Locked Contracts (PTLCs)
  • Preparing for taproot: PTLCs 🔗
• Reproducible builds
  • Bitcoin Core #22642 allows concatenation of Guix-based attestations for batch verification 🔗
• Spontaneous payments
  • Rust-Lightning #967 adds support for sending keysend-style spontaneous payments 🔗
• Transaction bloom filtering
  • History of the mempool P2P message being deprecated along with BIP37 bloom filters 🔗

July 2021

• Output script descriptors
  • Seven BIPs proposed for standardized output script descriptors 🔗
  • Preparing for taproot: output script descriptors 🔗
  • Bitcoin Core #19651 adds support for updating descriptors via importdescriptor 🔗
  • Output script descriptors versus versioned and unversioned BIP32 seeds 🔗
• Bech32(m)
  • Wiki page for tracking wallet & service support of bech32m 🔗
  • Sparrow wallet adds support for bech32m addresses 🔗
• Taproot
  • BIPs #1137 adds BIP86 with a key derivation scheme for single key P2TR outputs 🔗
  • Sparrow wallet adds support for P2TR keypath spends on regtest and signet 🔗
• Addr v2
  • BIPs #1134 clarifies BIP155 usage of `sendaddr2’ P2P feature negotiation message 🔗
• Anonymity networks
  • Bitcoin Core #22112 changes the assumed port for I2P addresses to be 0 instead of 8333 🔗
• Block explorers
  • BTCPay Server #2655 improves privacy by not sending HTTP referer field to explorers 🔗
• Channel announcements
  • C-Lightning #4639 adds experimental support for gossiping liquidity advertisements 🔗
• Discreet Log Contracts (DLCs)
  • Alpha release of Suredbits’s DLC wallet 🔗
• Dual funding
  • C-Lightning #4639 adds experimental support for liquidity advertisments based on dual funding 🔗
• HD key generation
  • No changes to BIP32 derivation needed to implement taproot receiving support 🔗
• Liquidity advertisements
  • C-Lightning #4639 adds experimental support for liquidity advertisements 🔗
• LNURL
  • Stacker News launched with LNURL authentication 🔗
• Offers
  • Offers specification updated to no longer require a signature 🔗
• OP_CAT
  • Discussion about OP_CHECKSIGFROMSTACK branches off into discussion about OP_CAT 🔗
• OP_CHECKSIGFROMSTACK
  • Call for OP_CHECKSIGFROMSTACK design suggestions 🔗
• Payment secrets
  • C-Lightning #4646 makes payment secrets required 🔗
• Partially signed bitcoin transactions
  • BIPs #1139 adds BIP371 specifying new fields for using PSBTs with P2TR spends 🔗
• Reproducible builds
  • Question: what’s the purpose of Guix within Gitian? 🔗
• Schnorr signatures
  • Libsecp256k1 #844 updates schnorr API to allow signing arbitrary length messages 🔗
• SIGHASH_ANYPREVOUT
  • BIPs #943 updates BIP118 to be named SIGHASH_ANYPREVOUT rather than SIGHASH_NOINPUT 🔗
• Unannounced channels
  • C-Lightning #4611 updates the keysend RPC to support unannounced channels 🔗
• Wallet labels
  • Bitcoin Core #19651 allows the wallet key manager to edit labels among other data 🔗
• Zero-conf channels
  • Discussion about standardizing zero-conf channel opens 🔗

June 2021

• Taproot
  • Bitcoin Core #22051 adds support for importing descriptors for taproot outputs 🔗
  • Taproot locked in; activation to occur at block 709,632 🔗
  • Bitcoin Core #21365 allows the wallet to create signatures for P2TR spends 🔗
  • Proposed BIP to standardize a wallet path for single-sig P2TR addresses 🔗
• Bech32(m)
  • C-Lightning 🔗
  • Preparing for taproot #1: bech32m sending support 🔗
  • Rust Bitcoin #601 adds support for parsing bech32m addresses 🔗
• Atomic multipath payments (AMPs)
  • LND #5336 adds the ability for users to reuse AMP invoices non-interactively 🔗
  • LND 0.13.0-beta allows receiving and sending payments using AMP 🔗
• HD key generation
  • Bitcoin Core #22095 adds test to ensure BIP32 derived keys are correctly padded 🔗
  • Proposed BIP32 key derivation path for single-sig P2TR 🔗
• Replace-by-fee (RBF)
  • Proposal to allow any mempool transaction to be replaced by default 🔗
  • Trezor wallet software defaults to enabling BIP125 RBF 🔗
• Adaptor signatures
  • Question: Why does blockwide signature aggregation prevent adaptor signatures? 🔗
• Anchor outputs
  • LND 0.13.0-beta begins using anchor outputs by default for all new channels 🔗
• Anonymity networks
  • Bitcoin Core #22050 drops support for deprecated version 2 Tor onion services 🔗
• Channel commitment upgrades
  • C-Lightning #4532 adds experimental support for upgrading a channel 🔗
• Coinjoin
  • Candidate set based block templates may help fee bumping large coinjoins 🔗
• Child pays for parent (CPFP)
  • Candidate set block templates may make some CPFP fee bumps more effective 🔗
• Cross-input signature aggregation (CISA)
  • Question: why does signature aggregation interefer with signature adaptors? 🔗
• Fee sniping
  • BIP proposed for wallets to set nSequence by default on taproot transactions 🔗
• Hardware wallet interface (HWI)
  • Bitcoin Core GUI #4 adds initial support for using HWI external signers via the GUI 🔗
• Large channels
  • BOLTs #877 removes the protocol-level per-payment amount limit 🔗
• LNURL
  • Phoenix v1.4.12 adds support for the LNURL-pay protocol 🔗
• MuSig
  • Benchmark: 1 million signers with MuSig 🔗
• Output script descriptors
  • Bitcoin Core #22051 adds support for importing descriptors for taproot outputs 🔗
• Package relay
  • Bitcoin Core #20833 allows testmempoolaccept to evaluate descendant transaction chains 🔗
• Payjoin
  • BTCPay Server #2450 makes generating payjoin-compatible invoices the default for new hot wallets 🔗
• Payment batching
  • Candidate set based block templates may help fee bumping batched payments 🔗
• Payment secrets
  • LND #5336 allows non-interactive reuse of AMP invoices by changing the payment secret 🔗
• Partially signed bitcoin transactions
  • PSBT extensions for taproot 🔗
• Responsible disclosures
  • Eugene Siegel responsibly disclosed a remote crash vulnerability in Bitcoin Core 🔗
• Signet
  • LND #5025 adds basic support for using signet 🔗
• Tapscript
  • Bitcoin Core #21365 allows the wallet to create signatures for tapscript spends 🔗

May 2021

• Taproot
  • Miners encouraged to start signaling readiness for taproot 🔗
  • Bitcoin Core 0.21.1 released ready to activate taproot 🔗
  • BIPs #1104 adds activation parameters to the BIP341 taproot specification 🔗
  • Rust Bitcoin #589 starts implementing support for taproot and schnorr signatures 🔗
• HD key generation
  • Closing lost LN channels with only a BIP32 seed 🔗
  • BIPs #1089 assigns BIP87 to proposal for standardized BIP32 paths for multisig wallets 🔗
  • BIPs #1097 assigns BIP129 to proposal for exchange of xpubs during multisig wallet set up 🔗
• Soft fork activation
  • Miners encouraged to start signaling readiness for taproot 🔗
  • Bitcoin Core 0.21.1 released ready to activate taproot 🔗
  • BIPs #1104 adds activation parameters to the BIP341 taproot specification 🔗
• Atomic multipath payments (AMPs)
  • LND #5159 adds support for making spontaneous AMPs 🔗
  • LND #5253 adds support for Atomic Multipath Payment (AMP) invoices 🔗
• Bech32(m)
  • Blockchain.com adds support for bech32 receiving and spending 🔗
  • Electrum 4.1.0 adds support for bech32m 🔗
• Child pays for parent (CPFP)
  • Bitcoin Core #21359 allows CPFP fee bumping incoming payments 🔗
  • Sparrow 1.4.0 adds support for CPFP fee bumping from transaction list 🔗
• Output script descriptors
  • Bitcoin Core #20867 increases the maximum multisig keys for descriptors to 20 🔗
  • BIPs #1089 assigns BIP87 to a multisig wallet standard using descriptors 🔗
• Payment secrets
  • Rust-Lightning #893 requires payment secrets to prevent multipath probing 🔗
  • Eclair #1810 makes it mandatory for peers to signal and comply with the payment_secret feature 🔗
• Partially signed bitcoin transactions
  • LND #5291 improves the way it ensures PSBTs use segwit inputs 🔗
  • BlueWallet v6.1.0 adds support for using PSBTs with watch-only wallets 🔗
• Replace-by-fee (RBF)
  • CVE-2021-31876 discrepancy between BIP125 and Bitcoin Core implementation 🔗
  • Continued discussion about CVE-2021-31876’s impact on protocols using RBF 🔗
• Anchor outputs
  • LND #5274 limits the maximum funds reserved for fee bumping anchor outputs 🔗
• AssumeUTXO
  • Bitcoin Core #19521 simplifies generating UTXO set hashes for old blocks 🔗
• CVEs (various)
  • CVE-2021-31876: discrepancy between BIP125 and Bitcoin Core implementation 🔗
• Dual funding
  • C-Lightning #4489 adds plugin for configuring dual-funding behavior 🔗
• Gap limits
  • BIPs #1025 assigns BIP88 to the standardized format for BIP32 path templates 🔗
• Multipath payments
  • Electrum 4.1.0 adds support for multipath payments 🔗
• Peer storage
  • Restoring LN channels from only a BIP32 seed 🔗
• Reproducible builds
  • Bitcoin Core #21462 adds tooling for attesting to Guix-based builds 🔗
• Responsible disclosures
  • Antoine Riard disclosed CVE-2021-31876 enhanced pinning against LN due to BIP125 discrepancy 🔗
• Schnorr signatures
  • Rust Bitcoin #589 starts implementing support for taproot and schnorr signatures 🔗
• Segregated witness
  • Bitcoin Core #21009 removes logic needed to upgrade a pre-segwit node to segwit 🔗
• Static channel backups
  • Closing lost channels with only a BIP32 seed and option_data_loss_protect 🔗
• Trampoline payments
  • Electrum 4.1.0 adds support for trampoline payments 🔗
• Transaction pinning
  • CVE-2021-31876 reduces expected cost of some pinning attacks 🔗

April 2021

• Soft fork activation
  • Compromise proposed to use MTP to activate taproot with speedy trial 🔗
  • PR Review Club discussion about burying past soft fork deployments 🔗
  • Bitcoin Core #21377 and #21686 add taproot activation mechanism and params 🔗
• Anonymity networks
  • Bitcoin Core #21594 adds a network type field to the getnodeaddresses RPC 🔗
  • Bitcoin Core #20197 updates eviction logic to keep long-running onion peers 🔗
• Dual funding
  • C-Lightning 0.10.0 includes experimental support for dual funding 🔗
  • Dual funding’s interactive construction used in splicing proposal 🔗
• Taproot
  • Compromise proposed to use MTP to activate taproot with speedy trial 🔗
  • Bitcoin Core #21377 and #21686 add taproot activation mechanism and params 🔗
• Adaptor signatures
  • Libsecp256k1-zkp #117 adds support for simplified ECDSA signature adaptors 🔗
• Anchor outputs
  • Request for feedback on using anchor outputs by default in LND 🔗
• ASICBoost
  • Question about block templates versus actual blocks: ASICBoost explains one difference 🔗
• Atomic multipath payments (AMPs)
  • LND #5108 adds support for spontaneous multipath payments using AMP 🔗
• Child pays for parent (CPFP)
  • Challenges of using CPFP fee bumps for LN commitment transactions 🔗
• Fee sponsorship
  • Call for topics in layer-crossing workshop, including fee sponsorship 🔗
• Miniscript
  • Specter-DIY v1.5.0 adds support for miniscript 🔗
• Scriptless multisignatures
  • Signature adaptors without requiring support for multisignatures 🔗
• Offers
  • Offers specification updated to partly address stuck payments 🔗
• OP_CHECKTEMPLATEVERIFY
  • Public launch of Sapio with support for using OP_CHECKTEMPLATEVERIFY 🔗
• Output script descriptors
  • Specter-DIY v1.5.0 adds full descriptor support 🔗
• Package relay
  • Upcoming relay policy workshop to discuss package relay and other topics 🔗
• Pay-to-Contract (P2C) protocols
  • Question: Can Taproot commit arbitrary data to chain without any additional footprint? 🔗
• Payjoin
  • BTCPay Server #2425 allows receiving payjoin payments without an inovice 🔗
• Proof of payment
  • Using LN offers and proof of payment to partly address stuck payments 🔗
• Replace-by-fee (RBF)
  • Upcoming relay policy workshop to discuss RBF and other topics 🔗
• Side channels
  • Libsecp256k1 #906 reduces iterations when using a constant-time signing algorithm 🔗
• Signet
  • Discussion about multiple signet compatibilty with soft fork activation 🔗
• Splicing
  • Draft specification for LN splicing based on interactive funding protocol 🔗
• Spontaneous payments
  • LND #5108 adds support for spontaneous multipath payments using AMP 🔗
• Timelocks
  • Challenges related to timelocks when using CPFP fee bumping in LN 🔗

March 2021

• Taproot
  • Alternative methods of activating taproot discussed 🔗
  • Documenting the intention to use and build upon taproot 🔗
  • Discussion of quantum computer attacks on taproot 🔗
  • Regular meetings scheduled to help activate taproot 🔗
• Bech32(m)
  • BTCPay Server #2181 uppercases bech32 addresses in QR codes 🔗
  • Bitcoin Core #20861 implements support for bech32m addresses 🔗
  • BitMEX exchange announces support for bech32 deposit addresses 🔗
• Anonymity networks
  • Question: how to use I2P with Bitcoin Core? 🔗
  • Bitcoin Core #20685 adds support for the I2P privacy network 🔗
• Hardware wallet interface (HWI)
  • Significantly updated and extended HWI documentation 🔗
  • Bitcoin Core #16546 adds external signer interface compatible with HWI 🔗
• Partially signed bitcoin transactions
  • C-Lightning #4428 switches an RPC to accepting PSBTs for enhance validation 🔗
  • BIPs #1059 publishes the draft specification for v2 PSBTs as BIP370 🔗
• Soft fork activation
  • BIPs #1069 makes BIP8 signal threshold configurable and reduces default 🔗
  • Taproot activation mailing list discussion; Speedy Trial attempt proposed 🔗
• Addr v2
  • Bitcoin Core #20685 Adds I2P support, including addrv2 gossiping 🔗
• Anchor outputs
  • Eclair 0.5.1 adds and updates features preparing for anchor outputs 🔗
• BIP70 payment protocol
  • Mailing list discussion about a BIP70 replacement 🔗
• CLTV expiry delta
  • Rust-Lightning #849 makes cltv_expiry_delta configurable and reduces the default from 72 to 36 🔗
• Discreet Log Contracts (DLCs)
  • Discussion of fraud proofs in DLC v0 specification 🔗
• Discrete log equivalency (DLEQ)
  • C-Lightning #4410 updates to latest dual-funding specification draft, which no longer uses PODLE 🔗
• Dual funding
  • C-Lightning #4410 updates experimental implementation dual funding 🔗
• Erlay
  • PR Review Club: #18261 implementing Erlay 🔗
• Hash Time Locked Contract (HTLC)
  • Eclair #1738 combines multiple HTLC enforcements into a single transaction 🔗
• Just-in-time (JIT) routing
  • Paper analyzes effect of JIT rebalancing on payment success rate 🔗
• LNURL
  • Discussion about a BIP70 replacement, including a version that works with LNURL 🔗
• Multipath payments
  • New paper analyzes benefit of multipath payments on routing success 🔗
• Output linking
  • Reused hash-based addresses provide no quantum resistance 🔗
• Output script descriptors
  • Specter v1.2.0 includes support for Bitcoin Core descriptor wallets 🔗
• Quantum resistance
  • Discussion of quantum computer attacks on taproot 🔗
• Replace-by-fee (RBF)
  • Recovering lost LN funding transactions after RBF fee bumping 🔗
• Side channels
  • Libsecp256k1 #831 implements SafeGCD algorithm which speeds up side-channel resistant signing 🔗
• Signer delegation
  • Signing delegation under existing consensus rules 🔗
• Spontaneous payments
  • C-Lightning #4404 allows keysending to nodes that don’t advertise support 🔗
• Tapscript
  • Using backup tapscript spending paths to recover from crypto breaks 🔗

February 2021

• Soft fork activation
  • Taproot activation meeting summary and follow-up meeting schedule 🔗
  • BIPs #1021 eases BIP8 LockinOnTimeout=True signaling requirements 🔗
  • BIPs #1020 updates BIP8 to no longer require signaling during lockin period 🔗
  • Summary of second taproot activation meeting and mailing list discussion 🔗
• Compact block filters
  • New Rust-Language light client released using compact block filters 🔗
  • Question about high bandwidth requirements for serving BIP157 filters 🔗
  • Bitcoin Core #15946 allows retaining filters on a pruned node 🔗
• Output script descriptors
  • Bitcoin Core #20226 adds new listdescriptors RPC for its wallet 🔗
  • Bitcoin Dev Kit v0.2.0 released with descriptor support 🔗
  • Bitcoin Core #19136 extends getaddressinfo to return parent descriptors 🔗
• Compact block relay
  • Bitcoin Core PR Review Club about dropping support for v1 compact blocks 🔗
  • Bitcoin Core #20764 adds BIP152 high bandwidth indicator to bitcoin-cli 🔗
• Partially signed bitcoin transactions
  • BIPs #988 updates BIP174 to require output fields be initialized 🔗
  • BIPs #1055 updatse BIP174 with new versioning information 🔗
• Taproot
  • Summary of taproot activation discussion & additional meeting scheduled 🔗
  • Summary of taproot activation discussion regarding BIP8 LOT parameter 🔗
• Bech32(m)
  • BIPs #1056 adds BIP350 for bech32m 🔗
• Channel announcements
  • Blockstream Satellite begins broadcasting LN gossip data 🔗
• Channel jamming attacks
  • Renewed discussion about bidirectional upfront LN fees 🔗
• Covenants
  • Replicating the OP_CSFS covenant-enabling opcode with OP_CAT and schnorr signatures 🔗
• Discreet Log Contracts (DLCs)
  • New mailing list for discussion of DLC protocol development 🔗
• Exfiltration-resistant signing
  • Description of anti-exfiltration technique being used in BitBox02 and Jade hardware wallets 🔗
• Generic signmessage
  • BIPs #1048 rewrites BIP322 to simplify implementation 🔗
• HD key generation
  • Proposal for secure exchange of BIP32 xpubs during multisig wallet set up 🔗
• OP_CAT
  • Replicating OP_CHECKSIGFROMSTACK with schnorr signatures and OP_CAT 🔗
• OP_CHECKSIGFROMSTACK
  • Replicating OP_CHECKSIGFROMSTACK with schnorr signatures and OP_CAT 🔗
• Point Time Locked Contracts (PTLCs)
  • Technique for implementing logical OR on LN using PTLCs 🔗
• Schnorr signatures
  • Comparison of SSS to OP_CHECKMULTISIG to schnorr multisignatures 🔗
• Side channels
  • New SafeGCD algorithm can speed up signing while remaining side-channel resistant 🔗
• SIGHASH_ANYPREVOUT
  • Using schnorr signatures plus OP_CAT to simulate SIGHASH_ANYPREVOUT 🔗
• Vaults
  • Using schnorr signatures plus OP_CAT to create vaults 🔗

January 2021

• Output script descriptors
  • Bitcoin Core 0.21.0 released with experimental native descriptor wallets 🔗
  • BTCPay Server #2169 adds functions for importing some descriptors 🔗
  • BTCPay Server 1.0.6.7 released with support for descriptors in wallet setup 🔗
• Addr v2
  • Bitcoin Core 0.21.0 released with version 2 addr support 🔗
  • Rust Bitcoin 0.26.0 released with version 2 addr support 🔗
• Anchor outputs
  • LND 0.12.0-beta adds watchtower support for channels using anchor outputs 🔗
  • LND #4908 reserves a balance for fee bumping when using anchor outputs 🔗
• Anonymity networks
  • Bitcoin Core GUI #162 adds network type information to the GUI Peers window 🔗
  • Bitcoin Core 0.21.0 released with support for Tor v3 onion addresses 🔗
• Compact block filters
  • Bitcoin Core 0.21.0 released with support for serving compact block filters 🔗
  • Question: how do clients using BIP157 receive unconfirmed transactions? 🔗
• Payjoin
  • Discussion about how to increase payjoin adoption 🔗
  • Coldcard hardware wallet adds support for paying payjoin 🔗
• Signet
  • Bitcoin Core 0.21.0 released with support for signets 🔗
  • Bitcoin Core #19937 adds utilities for mining signet blocks 🔗
• AssumeUTXO
  • MuHash function added in preparation for tracking UTXO state hashes 🔗
• Bech32(m)
  • Draft BIP for bech32m 🔗
• Discrete log equivalency (DLEQ)
  • New proposal to prevent UTXO probing in LN dual funding compared to PODLE 🔗
• Dual funding
  • Preventing UTXO probing in dual funded channels; PoDLE tradeoffs 🔗
• Eclipse attacks
  • Proposed disabletx message to help allow more block-relay-only peers 🔗
• Generic signmessage
  • Proposed rewrite of BIP322 to simplify implementation 🔗
• Offers
  • C-Lightning 0.9.3 released with experimental offers support 🔗
• Payment probes
  • Preventing UTXO probing in dual funded channels 🔗
• Partially signed bitcoin transactions
  • LND 0.12.0-beta adds a new psbt wallet subcommand for PSBTs 🔗
• Replace-by-fee (RBF)
  • Question: would first-seen-safe prevent confirmed RBF double spends? 🔗
• Reproducible builds
  • Bitcoin Core #17920 adds Guix support for macOS builds 🔗
• Soft fork activation
  • Meeting scheduled to discuss taproot activation 🔗
• Taproot
  • Meeting to discuss taproot activation mechanisms 🔗
• Vaults
  • Making hardware wallets compatible with advanced features, like vaults 🔗

December 2020

• Anchor outputs
  • LND #4782 adds watchtower client support for channels using anchor outputs 🔗
  • LND #4779 allows sweeping HTLCs from anchor outputs 🔗
  • BOLT5 updated to prevent a pinning attack against anchor outputs 🔗
  • 2020 year in review: anchor outputs 🔗
• Bech32(m)
  • Bech32 algorithm revision research and proposal 🔗
  • Problems with QR-encoded bech32 BIP21 invoices with uppercase schema 🔗
  • Q&A: What is the difference between ‘native segwit’ and ‘bech32’? 🔗
  • 2020 year in review: taproot’s need for a modified bech32 address format 🔗
• Addr v2
  • Bitcoin Core #20564 only sends addrv2 to protocol version 70016 peers 🔗
  • BIP155 updated to require sendaddrv2 message be sent before verack 🔗
  • 2020 year in review: version 2 addr message 🔗
• Eclipse attacks
  • Review Club chat about PR #19858 to make eclipse attacks more difficult 🔗
  • Bitcoin Core PR #19858 improves partition resistance to eclipse attacks 🔗
  • 2020 year in review: fast eclipse attacks against LN nodes 🔗
• Channel jamming attacks
  • Fidelity bonds to prevent channel jamming attacks 🔗
  • 2020 year-in-review: LN channel jamming attacks 🔗
• Coinswap
  • 2020 year-in-review: succinct atomic swaps 🔗
  • 2020 year-in-review: routed coinswap discussion and implementation 🔗
• Hash Time Locked Contract (HTLC)
  • 2020 year in review: switching LN from HTLCs to PTLCs 🔗
  • 2020 year in review: HTLC mining incentives 🔗
• Offers
  • C-Lightning #4255 is the first of a series of PRs for offers 🔗
  • 2020 year in review: LN offers 🔗
• Partially signed bitcoin transactions
  • A new backwards-incompatible version of PSBT is proposed 🔗
  • New PSBT Toolkit software provides GUI for working with PSBTs 🔗
• Soft fork activation
  • Q&A comparison of different soft fork activation mechanisms 🔗
  • 2020 year-in-review: soft fork activation mechanisms 🔗
• Adaptor signatures
  • 2020 year in review: signature adaptors for LN channel commitments 🔗
• Anonymity networks
  • Year-in-review: support for Tor v3 onion addresses 🔗
• Compact block filters
  • 2020 year in review: compact block filters 🔗
• Compact block relay
  • Bitcoin Core #19776 updates getpeerinfo RPC with BIP152 peer status 🔗
• CVEs (various)
  • CVE-2020-26896: LND #4752 updates preimage revelation code 🔗
• Discreet Log Contracts (DLCs)
  • 2020 year-in-review: four compatible implementations of DLCs 🔗
• Dual funding
  • 2020 year-in-review: LN dual funding and interactive funding 🔗
• Fee estimation
  • Bitcoin Core #18766 disables the ability to get fee estimates when using blocks-only mode 🔗
• Generic signmessage
  • 2020 year in review: generic signmessage 🔗
• Large channels
  • 2020 year in review: large channels 🔗
• Miniscript
  • Formal specification of miniscript 🔗
• MuSig
  • 2020 year in review: MuSig2 🔗
• Output linking
  • 2020 year in review: transaction origin privacy 🔗
• Output script descriptors
  • Bitcoin Wallet Tracker (BWT) adds descriptor support 🔗
• Payjoin
  • 2020 year in review: payjoin 🔗
• Payment batching
  • BOLTs #803 adds recommendations for securely using batches to settle HTLCs 🔗
• Payment secrets
  • LND #4752 prevents the node from releasing a local payment preimage without a payment secret 🔗
• Point Time Locked Contracts (PTLCs)
  • 2020 year in review: switching LN from HTLCs to PTLCs 🔗
• Replace-by-fee (RBF)
  • Sparrow wallet adds support for RBF fee bumping 🔗
• Schnorr signatures
  • 2020 year in review: Taproot, tapscript, and schnorr signatures 🔗
• Signet
  • 2020 year in review: signet 🔗
• Taproot
  • 2020 year in review: Taproot, tapscript, and schnorr signatures 🔗
• Tapscript
  • 2020 year in review: Taproot, tapscript, and schnorr signatures 🔗
• Timelocks
  • BOLTs #803 updates BOLT5 with recommendations for handling timelocks near maturity 🔗
• Transaction pinning
  • BOLT5 updated to prevent a transaction pinning attack 🔗
• Vaults
  • 2020 year in review: vaults 🔗
• Watchtowers
  • LND #4782 adds watchtower client support for channels using anchor outputs 🔗

November 2020

• CVEs (various)
  • CVE-2020-26896: BOLTs #808 adds warning about improper preimage revelation 🔗
  • CVE-2020-26895: BOLTs #807 adds warning about non-standard signatures 🔗
• Output script descriptors
  • C-Lightning #4171 allows retrieving the wallet’s onchain descriptors 🔗
  • Q&A about migration from legacy wallets to descriptor wallets 🔗
• Soft fork activation
  • Survey released with developer preferences for soft fork activations 🔗
  • Website listing miner support for taproot activation 🔗
• Taproot
  • Summary of results from surveying developers about taproot activation 🔗
  • Website tracking miner support for taproot before signaling begins 🔗
• AssumeUTXO
  • Review Club summary of MuHash implementation for quickly hashing UTXO set 🔗
• Channel jamming attacks
  • Bi-directional upfront fees to mitigate jamming attacks 🔗
• Eclipse attacks
  • Eclair #1545 adds multiple header sources to make eclipse attacks harder 🔗
• Hold invoices
  • Discussion about bi-directional fees to allow charging for hold invoices 🔗
• Multipath payments
  • Eclair #1599 improves multipath spending to direct channel counterparties 🔗
• Payjoin
  • Sparrow Wallet 0.9.7 adds support for BIP78 payjoin 🔗
• Payment batching
  • Sparrow wallet adds support for payment batching 🔗
• Signet
  • Bitcoin Core #20145 adds script for requesting signet coins 🔗

October 2020

• Channel jamming attacks
  • Eclair #1539 implements a simple measure to reduce channel jamming attacks 🔗
  • Incremental routing as an alternative to upfront fees 🔗
  • Trusted upfront fees to mitigate jamming attacks 🔗
  • More upfront fees discussion 🔗
• Responsible disclosures
  • Antoine Riard disclosed CVE-2020-26895 and CVE-2020-26896 allowing funds theft from LND 🔗
  • Practicalswift responsibly disclosed a netsplit vulnerability in Bitcoin Core 🔗
  • Michael Ford disclosed a Bitcoin Core vulnerability based on a discovery by Ronald Huveneers 🔗
• Anonymity networks
  • Bitcoin Core #19954 completes the BIP155 addr v2 implementation 🔗
  • Bitcoin Core #19991 enables tracking inbound connections from onion peers 🔗
• CVEs (various)
  • CVE-2020-26895: full disclosure of on-standard signature acceptance 🔗
  • CVE-2020-26896: full disclosure of improper preimage revelation 🔗
• Generic signmessage
  • Alternative proposal for generic signmessage using virtual transactions 🔗
  • BIP322 updated to use virtual transactions 🔗
• Soft fork activation
  • Changes ‘unexpected version’ warnings implemented as part of BIP8 🔗
  • Bitcoin Core #19953 adds taproot code; activation still under discussion 🔗
• Adaptor signatures
  • Revised witness asymmetric channels proposal with signature adaptors 🔗
• Addr v2
  • Bitcoin Core #19954 implements BIP155 and Tor v3 support 🔗
• Anchor outputs
  • Eclair 0.4.2 adds experimental support for anchor outputs 🔗
• Bech32(m)
  • Discussion about updates to BIP173 bech32 to address mutability concerns 🔗
• Hash Time Locked Contract (HTLC)
  • CVE-2020-26896: premature preimage revelation in LND 🔗
• MAST
  • What are Merklized Alternative Script Trees? 🔗
• MuSig
  • MuSig2 paper published 🔗
• Payjoin
  • BlueWallet 5.6.1 adds support for BIP78 payjoin 🔗
• Payment probes
  • Upfront fees discussion and its ability to make probing more expensive 🔗
• Payment secrets
  • CVE-2020-26896 could have been prevented by payment secrets 🔗
• Proof of payment
  • CVE-2020-26896 improper preimage revelation gives proof of payment for stolen payments 🔗
• Proof of reserves
  • BIP322 generic signmessage updated to use virtual transactions that support basic proof of reserves 🔗
• Partially signed bitcoin transactions
  • LND #4389 adds a new psbt wallet subcommand for creating & signing PSBTs 🔗
• Point Time Locked Contracts (PTLCs)
  • Updated witness asymmetric channels proposal for move from HTLCs to PTLCs 🔗
• Schnorr signatures
  • Bitcoin Core #19953 merged with consensus implementation of BIP340 🔗
• Signet
  • Summary of Bitcoin Core PR Review Meeting on adding signet support 🔗
• Spontaneous payments
  • Eclair 0.4.2 adds support for keysend-style spontaneous payments 🔗
• Taproot
  • Bitcoin Core #19953 merged with consensus implementation of BIP341 🔗
• Tapscript
  • Bitcoin Core #19953 merged with consensus implementation of BIP342 🔗
• Testnet
  • Bitcoin PR review club on signet with questions and answers about testnet 🔗

September 2020

• Anchor outputs
  • LND #4558 updates LND to the latest anchor outputs specification 🔗
  • Vulnerability disclosed against experimenal anchor outputs proposal 🔗
  • LND #4606 & #4592 improve LND’s effectiveness at fee bumping anchor outputs 🔗
  • Why do anchor outputs need to enforce an nSequence of 1? 🔗
  • Eclair #1501 adds support for unilateral closes of channels using anchors 🔗
  • LND #4576 starts adding support for anchor outputs to LND’s watchtower 🔗
• Signet
  • Discussion about the parameters for a default signet 🔗
  • Discussion about the design decisions for signet 🔗
  • BIPs #983 updates BIP325 to omit signet commitments when unnecessary 🔗
  • Bitcoin Core #18267 and #19993 add support for signet 🔗
  • C-Lightning #4068 and #4078 update C-Lightning’s signet implementation 🔗
• Payment batching
  • C-Lightning #3812 adds batching support to its onchain wallet 🔗
  • C-Lightning #3763 adds new RPC to batch open channels 🔗
  • Bitcoin Core #16378 adds a new RPC to the wallet with batching support 🔗
• Eclipse attacks
  • Bitcoin Core #19670 reserves inbound slots for block-relay-only peers 🔗
  • CVE-2018-17145 InvDoS attack could’ve been used to eclipse nodes 🔗
• Hash Time Locked Contract (HTLC)
  • LND #4527 allows users to limit the maximum number of pending HTLCs 🔗
  • Stealing fees included in HTLCs created using SIGHASH_SINGLE 🔗
• Schnorr signatures
  • BIPs #982 updates BIP340 to consistently use evenness tiebreaker 🔗
  • Libsecp256k1 #558 implements schnorr signature verification and signing 🔗
• Timelocks
  • One-block relative timelocks to prevent pinning issues in coinswaps 🔗
  • Research into conflicts between timelocks and heightlocks 🔗
• Transaction pinning
  • Pinning attacks against a coinswap protocol 🔗
  • Transaction fee sponsorship proposal to attempt to eliminate pinning 🔗
• Adaptor signatures
  • Using signature adaptors for witness asymmetric payment channels 🔗
• Addr v2
  • BIPs #907 updates BIP155 messages to allow addresses up to 512 bytes 🔗
• Coinswap
  • Continued coinswap discussion focused on potential weaknesses 🔗
• CVEs (various)
  • CVE-2018-17145: full disclosure of inv out-of-memory DoS attack 🔗
• Dual funding
  • C-Lightning #3973 adds the accepter side of dual-funded channels 🔗
• Fee sponsorship
  • Transaction fee sponsorship proposal 🔗
• Hardware wallet interface (HWI)
  • HWI #363 adds support for Bitbox02 hardware wallet 🔗
• Large channels
  • LND #4567 adds a new --maxchansize parameter for large channels 🔗
• Miniscript
  • Miniscript to warn or fail for safety when mixed time/height locks used 🔗
• Payjoin
  • Joinmarket 0.7.0 adds support for BIP78 payjoin 🔗
• Partially signed bitcoin transactions
  • Joinmarket 0.7.0 adds support for PSBTs 🔗
• Point Time Locked Contracts (PTLCs)
  • Using witness asymmetric payment channels for move from HTLCs to PTLCs 🔗
• Replace-by-fee (RBF)
  • C-Lightning #3870 implements RBF scorched earth for penalty transactions 🔗
• Responsible disclosures
  • Braydon Fuller and Javed Khan report CVE-2018-17145 DoS vulnerability to devs of full nodes 🔗
• Soft fork activation
  • Conversation about segwit activation history and ideas for taproot 🔗
• Statechains
  • Transcript of discussion about multiple topics, including statechains 🔗
• Taproot
  • Discussion about taproot activation parameters 🔗
• Testnet
  • C-Lightning #3763 adds a new RPC used to open a channel to every public testnet LN node 🔗

August 2020

• Anchor outputs
  • Discussion of solutions for attacks against LN, including anchor outputs 🔗
  • Eclair #1491 adds support for anchor outputs 🔗
  • C-Lightning #3830 adds experimental support for anchor outputs 🔗
  • BOLTs #688 adds support for anchor outputs to the LN protocol 🔗
• Partially signed bitcoin transactions
  • BIP174 specification of PSBT updated in response to fee overpayment attack 🔗
  • Bitcoin Core #18654 adds new RPC specifically for RBF fee bumping PSBTs 🔗
  • BIPs #955 updates BIP174 PSBT to standardize supplying hash preimages 🔗
• CLTV expiry delta
  • LND #4488 updates the minimum CLTV expiry delta users may set to 18 blocks 🔗
  • BOLTS #785 updates the minimum CLTV expiry delta to 18 blocks 🔗
• Miniscript
  • Minsc: a new spending policy language based on miniscript 🔗
  • PSBT specification updated to improve miniscript compatibility 🔗
• Package relay
  • Discussion of solutions for attacks against LN, including package relay 🔗
  • Change to orphan parent fetching, may be replaced by package relay 🔗
• Payment batching
  • Specter Desktop adds payment batching support 🔗
  • Field Report: How batching could have saved millions of dollars in fees 🔗
• Signet
  • BIP325 updated for new signet block signing method 🔗
  • Will the availability of signet eliminate the need for a new testnet? 🔗
• Transaction pinning
  • Discussion of attacks against LN, including transaction pinning 🔗
  • Using attacks such as transaction pinning against eltoo 🔗
• Addr v2
  • Summary of Bitcoin Core PR Review Club discussion about an addr v2 PR 🔗
• Anonymity networks
  • Bitcoin Core PR Review Club on a proposed implementation of BIP155 addr v2 🔗
• Coinswap
  • Discussion about routed coinswaps 🔗
• Compact block filters
  • Bitcoin Core #19070 allows advertising support for serving BIP157 filters 🔗
• Covenants
  • Discussion about how Simplicity could be used for covenants 🔗
• Discreet Log Contracts (DLCs)
  • Beta application announced for creating test DLC derivatives 🔗
• Dual funding
  • C-Lightning #3954 adds locktime support to PSBT RPCs for dual funding 🔗
• Eltoo
  • Using attacks like transaction pinning and selective relay against eltoo 🔗
• Expiration floods
  • LN developer discussion about flood and loot attacks 🔗
• Large channels
  • LND 0.11.0-beta released with support for large channels by default 🔗
• MAST
  • Discussion about the evolution of MAST (and other things) into taproot 🔗
• Multipath payments
  • LND #4521 improves invoice routing hints for multipath payments 🔗
• OP_CHECKTEMPLATEVERIFY
  • Sapio: a new language for building contracts with OP_CHECKTEMPLATEVERIFY 🔗
• Payjoin
  • Wasabi adds support for BIP78 payjoin 🔗
• Schnorr signatures
  • Proposal to update BIP340 schnorr signatures to use evenness tiebreaker 🔗
• Segregated witness
  • BIPs #947 updates the BIP325 specification of signet to allow segwit-style virtual transactions 🔗
• SIGHASH_ANYPREVOUT
  • Discussion of various topics, including SIGHASH_ANYPREVOUT 🔗
• Simplicity
  • Transcript on implementing Simplicity as a taproot leaf version 🔗
• Taproot
  • Discussion of various topics, including taproot activation 🔗
• Testnet
  • Question: will there by a testnet4? 🔗

July 2020

• Partially signed bitcoin transactions
  • Bitcoin Core #19215 adds additional data to PSBTs for segwit inputs 🔗
  • C-Lightning #3775 adds RPCs for creating and using PSBTs 🔗
  • Electrum 4.0.1 replaces their partial transactions format with PSBTs 🔗
  • Initial release of Lily Wallet supports PSBTs 🔗
  • Field Report: Using PSBT at River Financial 🔗
  • LND #4455 makes it safe to batch open channels using PSBTs 🔗
• Taproot
  • New chatroom for discussing taproot activation 🔗
  • Upgrading LN commitment formats, including for taproot 🔗
  • Question about leaf versions in taproot 🔗
  • Question about the different features in taproot for upgrading 🔗
  • Discussion about backporting wtxid relay for taproot activation 🔗
• Multipath payments
  • Eclair #1427 and #1439 add support to Eclair for sending multipath payments 🔗
  • Eclair 0.4.1 adds support for sending multipath payments 🔗
  • Zap 0.7.0 Beta adds support for multipath payments 🔗
  • C-Lightning #3809 adds support for sending of multipath payments 🔗
• Spontaneous payments
  • LND #4167 allows spontaneous payments made using keysend to be held 🔗
  • Zap 0.7.0 Beta adds support for spontaneous payments 🔗
  • C-Lightning #3792 adds support for sending keysend spontaneous payments 🔗
  • Eclair #1485 adds support for keysend spontaneous payments 🔗
• Coinswap
  • Presentation about coinswaps 🔗
  • Presentation about succinct atomic swaps 🔗
• Segregated witness
  • BIPs #933 adds BIP339 for transaction relay announcement using segwit wtxids 🔗
  • Bitcoin Core #18044 adds support for announcing and requesting transactions by their segwit wtxid 🔗
• Soft fork activation
  • BIPs #550 revises BIP8 to allow use without initial mandatory lock-in 🔗
  • Taproot activation discussion on mailing list and in new IRC room 🔗
• Watchtowers
  • Service proposed for storing presigned watchtower transactions 🔗
  • Presentation about watchtower protocol development 🔗
• Anchor outputs
  • Eclair #1484 adds basic support for anchor outputs 🔗
• Bech32(m)
  • Proposed updates to BIP173 bech32 to address mutability concerns 🔗
• Channel commitment upgrades
  • Upgrading channel commitment formats 🔗
• Compact block relay
  • Consequences of not backporting taproot relay on compact block efficiency 🔗
• Eltoo
  • Upgrading LN commitment formats, including for eltoo 🔗
• Gap limits
  • Proposed BIP for BIP32 path templates, with maximum derivation limit 🔗
• HD key generation
  • Proposed BIP for BIP32 path templates 🔗
• Hold invoices
  • Zap 0.7.0 Beta adds support for hold invoices 🔗
• Hash Time Locked Contract (HTLC)
  • Discussion about the incentives to mine HTLCs 🔗
• Hardware wallet interface (HWI)
  • Initial release of Lily Wallet supports HWI 🔗
• Large channels
  • LND #4429 enables support for large channels by default 🔗
• Scriptless multisignatures
  • Discussion of multisignatures and threshold signatures 🔗
• MuSig
  • Presentations and discussions about musig-style multiparty signatures 🔗
• Out-of-band fees
  • Discussion of HTLC mining incentives and out-of-band fees 🔗
• Output script descriptors
  • Field Report: Using descriptors at River Financial 🔗
• Package relay
  • New BIP339 wtxid transaction announcements simplifies package relay 🔗
• Payjoin
  • New BIP78 specification of payjoin 🔗
• Schnorr signatures
  • Presentations and discussions about schnorr signatures 🔗
• SIGHASH_ANYPREVOUT
  • Request to replace BIP118 with the SIGHASH_ANYPREVOUT proposal 🔗
• Simplicity
  • Question about implementing taproot with Simplicity 🔗
• Statechains
  • Transcript about watchtowers and their usefulness for statechains 🔗
• Submarine swaps
  • Electrum 4.0.1 adds support for submarine swaps 🔗
• Threshold signature
  • Discussion about digital signatures schemes, including threshold signatures 🔗
• Transaction origin privacy
  • Bitcoin Core #19109 adds a per-peer rolling bloom filter to track recent tx announcements 🔗
• Vaults
  • Service proposed for storing presigned vault transactions 🔗

June 2020

• Taproot
  • Taproot eliminates vulnerability related to segwit fee overpayment attack 🔗
  • BIP341 transaction digest amended with extra commitment to scriptPubKeys 🔗
  • Coinpool: using taproot to help create payment pools 🔗
• Coinjoin
  • Comparison of coinjoin privacy to coinswap privacy 🔗
  • WabiSabi: a protocol for coordinated coinjoins with arbitrary output values 🔗
• Eclipse attacks
  • Time dilation attack: using eclipse attacks to steal money from LN nodes 🔗
  • Bitcoin Core 0.20 released with asmap feature to improve eclipse resistance 🔗
• Payjoin
  • Comparison of payjoin privacy to coinswap privacy 🔗
  • Discussion about payjoin and its history 🔗
• Responsible disclosures
  • Saleem Rashid disclosed to Trezor an issue previously identified by Greg Sanders 🔗
  • René Pickhardt disclosed fee ransom attack affecting multiple LN implementations 🔗
• SIGHASH_ANYPREVOUT
  • Impact of SIGHASH_NOINPUT and eltoo on LN backups 🔗
  • Coinpool: using SIGHASH_NOINPUT to help create payment pools 🔗
• Adaptor signatures
  • Paying for a PTLC pointlock using an signature adaptors 🔗
• Anchor outputs
  • Anchor outputs may help mitigate LN fee ransom attack 🔗
• Anonymity networks
  • Desktop version of Blockstream Green released with Tor support 🔗
• Coinswap
  • Design for a coinswap implementation 🔗
• Compact block filters
  • Bitcoin Core #19010 & #19044 add additional messages from BIP157 🔗
• Dual funding
  • Sydney meetup discussion about LN, including dual funding 🔗
• Eltoo
  • Impact of SIGHASH_NOINPUT and eltoo on LN backups 🔗
• HD key generation
  • BIPs #910 Assigns BIP85 to the Deterministic Entropy From BIP32 Keychains proposal 🔗
• Hash Time Locked Contract (HTLC)
  • LN fee ransom attack against channels that accept too many HTLCs 🔗
• Hardware wallet interface (HWI)
  • Fix for segwit fee overpayment attack affects HWI compatibility 🔗
• Joinpools
  • CoinPool generalized privacy for identifiable onchain protocols 🔗
• Scriptless multisignatures
  • Warning about using 160-bit addresses for naive multiparty multisignatures 🔗
• Partially signed bitcoin transactions
  • Bitcoin Core #18027 adds GUI support for signing & broadcasting PSBTs 🔗
• Segregated witness
  • Fee overpayment attack on multi-input segwit transactions 🔗
• Soft fork activation
  • Meetup discussion including potential soft fork activation mechanisms 🔗
• Transaction bloom filtering
  • Bitcoin Core #19260 disconnects peers who inappropriately send filterclear 🔗
• Vaults
  • Presentation of the Revault multiparty vault architecture 🔗
• Wallet labels
  • LND #4228 adds a new labeltx wallet command 🔗

May 2020

• Large channels
  • C-Lightning 0.8.2 released with support for large channels 🔗
  • LND 0.10.0-beta released with the ability to create invoices over 0.043 BTC 🔗
  • C-Lightning fixes incompatibility when opening large channels with Eclair 🔗
• Multipath payments
  • LND 0.10 presentation: multipath payments 🔗
  • LND 0.10.0-beta released with support for multipath payments 🔗
  • Lightning Loop adds support for multipath payments 🔗
• Partially signed bitcoin transactions
  • LND 0.10 presentation: funding channels using PSBTs 🔗
  • LND 0.10.0-beta released with support for funding channels using PSBTs 🔗
  • C-Lightning #3738 adds initial support for creating PSBTs 🔗
• Spontaneous payments
  • C-Lightning 0.8.2 released with a plugin for sending spontaneous payments 🔗
  • Juggernaut uses spontaneous payments for messaging and instant payments” 🔗
  • Breez wallet adds support for spontaneous payments 🔗
• Taproot
  • Request for additional signature commitment to previous scriptPubKeys 🔗
  • Request for comments on amending BIP341 taproot transaction digest 🔗
  • Example sizes of multisig taproot transactions 🔗
• Responsible disclosures
  • John Newbery responsibly disclosed memory Dos vulnerability in Bitcoin Core 🔗
  • John Newbery responsibly disclosed CPU-wasting DoS in Bitcoin Core 🔗
• Schnorr signatures
  • BIP340 schnorr updated with alternative tiebreaker & nonce recommendation 🔗
  • RFC6979 nonce generation versus BIP340’s recommended procedure 🔗
• Anchor outputs
  • LND 0.10 presentation: anchor outputs 🔗
• Anonymity networks
  • Presentation on enhancements in LND 0.10, including better Tor support 🔗
• Coinjoin
  • Allowing hardware wallets to safely sign automated coinjoin transactions 🔗
• Coinswap
  • Two-transaction cross chain atomic swap or same-chain coinswap 🔗
• Compact block filters
  • Bitcoin Core #18877 adds getcfcheckpt and cfcheckpt messages 🔗
• Consensus cleanup soft fork
  • Discussion of minimum safe transaction sizes 🔗
• Child pays for parent (CPFP)
  • Copay adds support for CPFP fee bumping incoming transactions 🔗
• CVEs (various)
  • CVE-2017-12842: discussion about minimum transaction size 🔗
• Dual funding
  • C-Lightning #3738 adds initial support for PSBTs, part of dual funding 🔗
• Eclipse attacks
  • Presentation about attacking Bitcoin Core, including using eclipse attacks 🔗
• Generic signmessage
  • Simplified BIP322, only allowing signatures from one script per proof 🔗
• Merkle tree vulnerabilities
  • CVE-2017-12842: discussion about minimum transaction size 🔗
• Output script descriptors
  • Bitcoin Core #16528 adds support for native output descriptor wallets 🔗
• Signet
  • BIP325 updated: all signets to use same genesis block but different magic 🔗
• Simplicity
  • Transcript on next generation smart contracting with Simplicity 🔗
• Timelocks
  • New cross-chain coinswap construction that only requires timelocks on one chain 🔗
• Transaction origin privacy
  • Bitcoin Core #18861 only allows a peer to request a tx if it informed that peer about the tx 🔗
• Watchtowers
  • C-Lightning #3659 adds support for watchtowers 🔗

April 2020

• Multipath payments
  • LND #3970 adds support for multipath payments to its payment lifecycle 🔗
  • LND #3967 adds support for sending multipath payments 🔗
  • Rust-Lightning #441 adds support for simplified multipath payments 🔗
• Scriptless multisignatures
  • Mitigating power analysis attacks, including against multisignature schemes 🔗
  • Alternative to ECDSA multisignatures for signature adaptors 🔗
  • Implementing statechains for ECDSA using multisignatures 🔗
• Adaptor signatures
  • ECDSA signature adaptors for statechains with secure multiparty computation 🔗
  • Work on PTLCs for LN using simplified ECDSA signature adaptors 🔗
• Covenants
  • Vault prototype using pre-signed transactions 🔗
  • Demo implementation of a multisig vaults covenant prototype 🔗
• Large channels
  • C-Lightning #3612 adds support for option_support_large_channel 🔗
  • LND #4075 allows creating invoices over 0.043 BTC 🔗
• Partially signed bitcoin transactions
  • LND #4079 adds support for funding channels with PSBTs 🔗
  • Bitcoin Core #17509 allows saving and loading PSBTs from files 🔗
• Rendez-vous routing
  • C-Lightning #3600 adds experimental support for onion messages using blinded paths 🔗
  • C-Lightning #3623 adds a minimal implementation for spending payments using blinded paths 🔗
• Schnorr signatures
  • Implementing statechains without schnorr signatures 🔗
  • Mitigating differential power analysis in schnorr signatures 🔗
• Unannounced channels
  • C-Lightning #3600 adds blinded paths to improve unannounced channel privacy 🔗
  • C-Lighting #3623 improves unannounced channel privacy when routing payments 🔗
• Vaults
  • Vault prototype written in Python 🔗
  • Revault: an implementation of multiparty vaults 🔗
• Anchor outputs
  • Using anchor outputs to ensure HTLC sends can be fee bumped 🔗
• CLTV expiry delta
  • New attack against LN payment atomicity: raising CLTV expiry delta recommended 🔗
• Duplex micropayment channels
  • Implementing statechains with duplex micropayment channels instead of LN-Symmetry 🔗
• Eltoo
  • Implementing statechains without eltoo 🔗
• Fee estimation
  • LND #4078 adds an estimatemode configuration setting for configuring its fee estimation 🔗
• Generic signmessage
  • Proposed update to BIP322 generic signmessage 🔗
• HD key generation
  • Proposal for using one BIP32 keychain to seed multiple child keychains 🔗
• Hash Time Locked Contract (HTLC)
  • Using inconsistencies in node mempools to attack HTLC atomicity 🔗
• Onion messages
  • C-Lightning #3600 adds experimental support for onion messages using blinded paths 🔗
• OP_CHECKTEMPLATEVERIFY
  • Vault prototype with sample implementation using OP_CHECKTEMPLATEVERIFY 🔗
• Package relay
  • New LN attack; full solution requires package relay 🔗
• Payjoin
  • BTCPay adds support for sending and receiving payjoined payments 🔗
• Proof of reserves
  • BIP322 generic signmessage updated to remove abstraction for proof of reserves 🔗
• Point Time Locked Contracts (PTLCs)
  • Simplified ECDSA adaptor signatures for PTLCs in LN channels 🔗
• Quantum resistance
  • Question about paying public keys directly versus hash indirection 🔗
• Reproducible builds
  • Bitcoin Core #17595 adds Guix support for Windows builds 🔗
• Responsible disclosures
  • John Newbery responsibly disclosed tx censorship vulnerability co-discovered by Amiti Uttarwar 🔗
• Signer delegation
  • Implementing statechain delegation without schnorr or eltoo 🔗
• Simplicity
  • Question about Simplicity and static analysis 🔗
• Spontaneous payments
  • C-Lightning #3611 adds a keysend plugin to support spontaneous payments 🔗
• Statechains
  • Discussion about implementing statechains without schnorr or eltoo 🔗
• Timelocks
  • Using decrementing locktimes instead of eltoo for statechains 🔗

March 2020

• Exfiltration-resistant signing
  • Proposal to standardize an exfiltration-resistant nonce protocol 🔗
  • Overview of anti-covert-channel signing techniques 🔗
• Schnorr signatures
  • Proposed update to schnorr key selection and signature generation 🔗
  • BIP340 schnorr signature recommendations updated for improved security 🔗
• Anchor outputs
  • LND #3821 adds draft anchor commitments support 🔗
• Anonymity networks
  • BOLTs #751 updates BOLT7 to better handled multi-network node announcements 🔗
• Eclipse attacks
  • Review club discussion of Bitcoin Core #17428 anchor connections 🔗
• Generic signmessage
  • Additional request for feedback on BIP322 generic signmessage 🔗
• Large channels
  • Eclair #1323 advertise support for channel opens over ~0.17 BTC 🔗
• Miniscript
  • Question about a specification for miniscript 🔗
• Payment batching
  • Withdrawal transactions from Coinbase now use payment batching 🔗
• Partially signed bitcoin transactions
  • Bitcoin Core #17264 includes HD derivation path in PSBTs by default 🔗
• Reproducible builds
  • Eclair #1307 updates packaging to also reproducibly build Eclair GUI 🔗
• Taproot
  • Security analysis: taproot in the generic group model 🔗
• Tapscript
  • Bitcoin Core #16902 fixes an inefficiency in OP_IF related opcodes 🔗
• Watchtowers
  • Updated watchtower BOLT specification proposal 🔗

February 2020

• Schnorr signatures
  • Safety of precomputed public keys used with schnorr signatures 🔗
  • BIP340 alternative x-only pubkey tiebreaker and tagged hash 🔗
  • Discussion about taproot versus other schnorr-enabling proposals 🔗
• Taproot
  • btcdeb adds tap command for experimenting with taproot and tapscript 🔗
  • Discussion about taproot versus alternatives 🔗
  • Taproot security from quantum computing threats 🔗
• Adaptor signatures
  • Taproot privacy gains, including those from signature adaptors 🔗
  • Boomerang contracts using signature adaptors for LN latency & throughput 🔗
• Anonymity networks
  • CKBunker allows specifying spending conditions for a Tor-enabled Coldcard 🔗
  • Eclair #1278 allows users to skip using SSL when using an onion service 🔗
• Discrete log equivalency (DLEQ)
  • PODLE proposed for use in dual-funded LN channels 🔗
  • Analysis of proposal to use PODLE in dual-funded LN channels 🔗
• Dual funding
  • Interactive construction of funding transactions 🔗
  • Using PoDLE in LN for dual funding privacy protection 🔗
• Fee sniping
  • Suggestion to use anti fee sniping for interactive LN funding transactions 🔗
  • C-Lightning #3465 implements anti fee sniping for withdrawal transactions 🔗
• Multipath payments
  • Eclair 0.3.3 adds support for multipath payments 🔗
  • Boomerang: improving latency and throughput with multipath payments 🔗
• Atomic multipath payments (AMPs)
  • LND #3957 adds code useful for Atomic Multipath Payments (AMP) support 🔗
• Channel jamming attacks
  • Reverse upfront fees to mitigate jamming 🔗
• Covenants
  • OP_CHECKTEMPLATEVERIFY workshop report 🔗
• Eclipse attacks
  • Bitcoin Core #16702 chooses peers based on ASN instead of IP address 🔗
• Hold invoices
  • Reverse up-front payments could improve hold invoice cost spreading 🔗
• Hardware wallet interface (HWI)
  • BTCPay Vault using HWI for signing 🔗
• Large channels
  • BOLTs #596 updates BOLT2 to allow channel opens over ~0.17 BTC 🔗
• MAST
  • Discussion about taproot versus alternative MAST-enabling proposals 🔗
• Offers
  • New direct messages protocol to be used for offers 🔗
• Onion messages
  • Proposal for LN direct messages 🔗
• OP_CHECKTEMPLATEVERIFY
  • OP_CHECKTEMPLATEVERIFY workshop summary 🔗
• Output script descriptors
  • Bitcoin Core #18032 add descriptor field to multisig address RPCs 🔗
• Payment batching
  • OP_CHECKTEMPLATEVERIFY discussion about compressed payment batching 🔗
• Payment probes
  • Discussion about preventing UTXO probing in interactively constructed LN funding transactions 🔗
• Partially signed bitcoin transactions
  • CKBunker using PSBTs for an HSM 🔗
• Quantum resistance
  • Question about whether taproot create security risk from quantum threats? 🔗
• Redundant overpayments
  • Presentation summary: Boomerang 🔗
• Rendez-vous routing
  • Decoy nodes and lightweight rendez-vous routing (blinded paths) 🔗
• Reproducible builds
  • Eclair #1295 allows the eclair-core module to be reproducibly built 🔗
• Side channels
  • Presentation: Remote Side-Channel Attacks on Anonymous Transactions 🔗
• Soft fork activation
  • OP_CHECKTEMPLATEVERIFY workshop discussion about activation mechanisms 🔗
• Spontaneous payments
  • Eclair 0.3.3 adds experimental support for trampoline payments 🔗
• Tapscript
  • btcdeb adds tap command for experimenting with taproot and tapscript 🔗
• Testnet
  • BOLTs #682 updates init message to prevent mainnet nodes from connecting to testnet nodes 🔗
• Vaults
  • OP_CHECKTEMPLATEVERIFY (CTV) workshop discussion: using CTV with vaults 🔗
• X-only public keys
  • Alternative x-only tiebreaker proposed and discussion of safety of precomputed pubkeys 🔗

January 2020

• Unannounced channels
  • C-Lightning #3351 enhances invoice RPC for private channels 🔗
  • Eclair #1283 allows multipath payments to traverse unannounced channels 🔗
  • Breaking the link between UTXOs and unannounced channels 🔗
• Coinjoin
  • Evaluation of coinjoins without equal value inputs or outputs 🔗
  • Wormhole: a protocol for sending payments as part of a chaumian coinjoin 🔗
• Multipath payments
  • Eclair #1283 allows multipath payments to traverse unannounced channels 🔗
  • LND 0.9.0-beta adds support for receiving multipath payments 🔗
• Output linking
  • Bitcoin Core #17621 fixes potential privacy leak in the avoid_reuse flag 🔗
  • Bitcoin Core #17843 fixes balance discrepancy related to avoid_reuse flag 🔗
• Partially signed bitcoin transactions
  • Bitcoin Core #16373 allows the bumpfee RPC used for RBF to return a PSBT 🔗
  • Bitcoin Core #17492 allows the wallet GUI to place a PSBT in the clipboard 🔗
• Anchor outputs
  • LND #3829 updates code & documentation to simplify adding anchor outputs 🔗
• Discreet Log Contracts (DLCs)
  • Drafting of an interoperability specification for DLCs 🔗
• Eltoo
  • Modification to SIGHASH_ANYPREVOUTANYSCRIPT to improve eltoo flexibility 🔗
• HD key generation
  • Question: why was the BIP32 fingerprint used for BIP174 PSBT? 🔗
• Scriptless multisignatures
  • BIPs #876 assigns BIP340 to new multisignature compatible scheme 🔗
• OP_CHECKTEMPLATEVERIFY
  • BIPs #875 assigns BIP119 to the OP_CHECKTEMPLATEVERIFY proposal 🔗
• Output script descriptors
  • Encoded descriptors (e.g., with base64) 🔗
• Payment batching
  • Non-equal value coinjoins could look like batching for improved privacy 🔗
• Replace-by-fee (RBF)
  • Bitcoin Core #16373 allows the bumpfee RPC used for RBF to return a PSBT 🔗
• SIGHASH_ANYPREVOUT
  • Modification to SIGHASH_ANYPREVOUTANYSCRIPT to improve eltoo flexibility 🔗
• Soft fork activation
  • Mailing list discussion of soft fork activation methods 🔗
• Taproot
  • Final organized review, presentation slides, and LN integration ideas 🔗
• Uneconomical outputs
  • LND #3809 adds a force parameter to the BumpFee RPC so that it can spend uneconomical UTXOs 🔗

December 2019

• Bech32(m)
  • LND #3767 rejects malformed BOLT11 invoices with a valid bech32 checksum 🔗
  • Proposed plan to deal with bech32 malleability in variable-length addresses 🔗
  • Analysis of bech32 error detection capability 🔗
  • 2019 year-in-review: bech32 mutability 🔗
• Covenants
  • OP_CHECKOUTPUTSHASHVERIFY renamed OP_CHECKTEMPLATEVERIFY and updated 🔗
  • Suggested changes to OP_CHECKTEMPLATEVERIFY proposal 🔗
  • 2019 year-in-review: OP_CHECKTEMPLATEVERIFY 🔗
• Multipath payments
  • Multiple LN implementations add multipath payment support 🔗
  • Basic multipath payment support added to LN specification 🔗
  • 2019 year-in-review: multipath payments 🔗
• OP_CHECKTEMPLATEVERIFY
  • OP_CHECKTEMPLATEVERIFY (CTV) replaces COSHV proposal; concerns restated 🔗
  • Proposed changes to bip-CTV 🔗
  • 2019 year-in-review: OP_CHECKTEMPLATEVERIFY 🔗
• Payment secrets
  • C-Lightning #3259 adds payment secrets to prevent multipath probing 🔗
  • LND #3788 adds support for “payment addresses” (payment secrets) 🔗
  • BOLTs #643 adds payment secrets to LN specification 🔗
• Watchtowers
  • Watchtower BOLT specification proposed 🔗
  • Discussion about watchtowers for eltoo payment channels 🔗
  • 2019 year-in-review: watchtowers 🔗
• Eclipse attacks
  • Discussion of eclipse attacks on LN nodes 🔗
  • 2019 year-in-review: erlay and other P2P improvements 🔗
• Tapscript
  • Discussion about position commitments using signature-checking opcodes 🔗
  • 2019 year-in-review: taproot and tapscript 🔗
• Anchor outputs
  • 2019 year-in-review: anchor outputs 🔗
• Anonymity networks
  • C-Lightning #3155 adds option to use a static onion service address 🔗
• AssumeUTXO
  • 2019 year-in-review: AssumeUTXO 🔗
• BIP70 payment protocol
  • 2019 year-in-review: Bitcoin Core BIP70 deprecation and disablement 🔗
• Coinjoin
  • 2019 year-in-review: SNICKER 🔗
• Consensus cleanup soft fork
  • 2019 year-in-review: consensus cleanup soft fork proposal 🔗
• Erlay
  • 2019 year-in-review: erlay 🔗
• HD key generation
  • Question: what is the max allowed depth for BIP32 derivation paths? 🔗
• Hash Time Locked Contract (HTLC)
  • Using eclipse attacks against nodes to prevent correct HTLC processing 🔗
• Hardware wallet interface (HWI)
  • 2019 year-in-review: HWI 🔗
• Miniscript
  • 2019 year-in-review: miniscript 🔗
• Scriptless multisignatures
  • Discussion about nested and composable multisignature schemes 🔗
• MuSig
  • Composable MuSig—concerns about safely using signer sub-groups 🔗
• OP_CODESEPARATOR
  • Discussion of OP_CODESEPARATOR design for proposed tapscript soft fork 🔗
• Payment probes
  • C-Lightning #3259 adds support for payment secrets designed to resist recipient probing 🔗
• Proof of reserves
  • Standardized format proposed for proof of reserves 🔗
• Reproducible builds
  • 2019 year-in-review: reproducible builds 🔗
• SIGHASH_ANYPREVOUT
  • 2019 year-in-review: SIGHASH_ANYPREVOUT 🔗
• Signet
  • 2019 year-in-review: signet 🔗
• Taproot
  • 2019 year-in-review: taproot 🔗
• Testnet
  • C-Lightning #3268 changes the default network from Bitcoin testnet to Bitcoin mainnet 🔗
• Trampoline payments
  • 2019 year-in-review: trampoline payments 🔗
• Vaults
  • 2019 year-in-review: vaults without covenants 🔗

November 2019

• Multipath payments
  • LND #3499 extends several RPCs to support tracking multipath payments 🔗
  • Eclair #1153 adds experimental support for multipath payments 🔗
  • LND #3442 preparatory PR adding features necessary for multipath payments 🔗
• Bech32(m)
  • How does the bech32 length-extension mutation weakness work? 🔗
  • Impact of bech32 length-change mutability on v1 segwit script length 🔗
• Coin selection
  • Bitcoin Core PR#17290 coin selection for customized transactions 🔗
  • Bitcoin Core 0.19 adds wallet flag to avoid address reuse privacy loss 🔗
• Compact block filters
  • Bitcoin Core 0.19 released with RPC support for BIP158 block filters 🔗
  • Maximum number of block filters per request increased from 100 to 1,000 🔗
• CPFP carve out
  • Continued discussion of LN anchor outputs using CPFP carve-out 🔗
  • Bitcoin Core 0.19 released with CPFP carve-out 🔗
• Taproot
  • Impact of bech32 length-change mutablity on v1 segwit script length 🔗
  • Blog post about x-only schnorr pubkeys 🔗
• Addr v2
  • Proposed per-node signaling for address relay with v2 addr messages 🔗
• Anchor outputs
  • Continued discussion of LN anchor outputs 🔗
• BIP70 payment protocol
  • Bitcoin Core 0.19 released with BIP70 support disabled by default 🔗
• Channel jamming attacks
  • Hashcash and refund-based upfront fees to mitigate jamming 🔗
• CVEs (various)
  • CVE-2017-18350: full disclosure of SOCKS proxy vulnerability 🔗
• Erlay
  • Erlay-compatible transaction reconciliation protocol published as BIP330 🔗
• Low-r grinding
  • C-Lightning #3220 begins always creating signatures with a low r value 🔗
• Scriptless multisignatures
  • Work on schnorr multisignature schemes that require reduced interactivity 🔗
• MuSig
  • MuSig and attacks based on Wagner’s algorithm 🔗
• Offers
  • New proposed BOLT for offers protocol 🔗
• Output linking
  • Bitcoin Core 0.19 new feature: avoid_reuse wallet flag 🔗
• Partially signed bitcoin transactions
  • Range of identifiers allocated to proprietary PSBT extensions 🔗
• Schnorr signatures
  • Blog post about x-only pubkeys for use in schnorr signature schemes 🔗
• Signet
  • Signet protocol published as BIP325 🔗
• Trampoline payments
  • Eclair #1209 adds experimental support for trampoline onion format 🔗
• Transaction bloom filtering
  • Bitcoin Core 0.19 released with bloom filters disabled 🔗
• X-only public keys
  • Taproot review: blog post published about x-only pubkeys 🔗

October 2019

• Schnorr signatures
  • Update on changes to schnorr, taproot, and tapscript 🔗
  • Talk summary: the quest for practical threshold Schnorr signatures 🔗
  • Announcement of structured taproot review (including schnorr) 🔗
  • Bitcoin Optech schnorr/taproot workshop 🔗
• Taproot
  • Update on changes to schnorr, taproot, and tapscript 🔗
  • Announcement of structured taproot review 🔗
  • Bitcoin Optech schnorr/taproot workshop 🔗
• Tapscript
  • Update on changes to schnorr, taproot, and tapscript 🔗
  • Announcement of structured taproot review (including tapscript) 🔗
  • Bitcoin Optech schnorr/taproot workshop 🔗
• Anchor outputs
  • LN simplified commitments discussion 🔗
• Anonymity networks
  • Blockstream Green built-in Tor support for both iOS and Android 🔗
• BIP70 payment protocol
  • Bitcoin Core PR#17165 removes support for BIP70 payment protocol 🔗
• Channel announcements
  • C-Lightning #3064 begins limiting gossip updates to once per day 🔗
• CPFP carve out
  • LN simplified commitments using CPFP carve-out 🔗
• CVE-2018-17144
  • Talk summary: Near misses: what could have gone wrong 🔗
• Default minimum transaction relay feerates
  • Bitcoin Core #16507 fixes a rounding issue related to the minimum relay feerate 🔗
• Erlay
  • Draft BIP for enabling Erlay compatibility 🔗
• MuSig
  • Schnorr signatures and musig 🔗
• OP_CAT
  • Discussion about SIGHASH_ANYPREVOUT spins off into discussion about OP_CAT 🔗
• Output script descriptors
  • Descriptors extended with sortedmulti 🔗
• Quantum resistance
  • Question about whether hashing pubkeys really provides quantum resistance? 🔗
• SIGHASH_ANYPREVOUT
  • Continued discussion of noinput/anyprevout 🔗
• Threshold signature
  • Talk summary: The quest for practical threshold Schnorr signatures 🔗
• X-only public keys
  • Summary of updates to taproot proposal, including x-only public keys 🔗

September 2019

• Channel announcements
  • Eclair #899 implements extended gossip queries as proposed in BOLTs #557 🔗
  • Eclair #954 adds a gossip sync whitelist 🔗
  • Request for comments on limiting LN gossip updates to once per day 🔗
• Adaptor signatures
  • Presentation: Blockchain design patterns: Layers and scaling approaches 🔗
• BIP70 payment protocol
  • Bitcoin Core PR#15584 disables support for BIP70 by default 🔗
• Coinjoin
  • Simple Non-Interactive Coinjoin with Keys for Encryption Reused (SNICKER) 🔗
• CPFP carve out
  • Bitcoin Core #16421 merged allowing carve outs to be RBF replaced 🔗
• Child pays for parent (CPFP)
  • Refactor preparing for ancestor relay 🔗
• Eclipse attacks
  • Preventing eclipse attacks using block-relay-only connections 🔗
• Eltoo
  • Eltoo demo implementation 🔗
• Hold invoices
  • LND #3390 simplifies hold invoice logic by separate HTLC tracking 🔗
• LN-Penalty
  • Discussion of LN-Penalty versus proposed LN-Symmetry (eltoo) 🔗
• Multipath payments
  • LND #3390 separates tracking of HTLCs from invoices as necessary for SMP 🔗
• Scriptless multisignatures
  • Talk about how taproot enables scaling when used with multisignatures 🔗
• Package relay
  • Bitcoin Core #16400 refactors code in anticipation of package relay 🔗
• Signet
  • Eltoo demo implementation using custom signet 🔗
• Taproot
  • Suggested removal of P2SH address wrapper from taproot proposal 🔗
• Tapscript
  • Tapscript resource limits 🔗
• Transaction origin privacy
  • Transcript: ‘TxProbe: discovering Bitcoin’s network topology using orphan transactions’ 🔗
• Unannounced channels
  • Talk about LN topology and lack of public info about unannounced channels 🔗
• Watchtowers
  • Watchtower storage costs 🔗

August 2019

• Transaction bloom filtering
  • Bitcoin Core PR#16248 adds bloom filter whitelist option 🔗
  • BRD field report: using native segwit addresses with bloom filters 🔗
• Channel announcements
  • LND #3359 adds an ignore-historical-filters configuration option for ignoring some gossip filters 🔗
• Covenants
  • Bitcoin vaults without covenants 🔗
• Hash Time Locked Contract (HTLC)
  • C-Lightning #2858 limits the maximum number of pending HTLCs to limit costs 🔗
• Miniscript
  • Miniscript request for comments 🔗
• Payment probes
  • BOLTs #608 provides a privacy update to BOLT4 to probe channels for the ultimate recipient 🔗
• Partially signed bitcoin transactions
  • Modifying BIP174 for extensibility 🔗
• Replace-by-fee (RBF)
  • Compatibility matrix—Replace by Fee 🔗
• Responsible disclosures
  • Michael Ford responsibly disclosed a BIP70-related vulnerability in Bitcoin Core 🔗
• Schnorr signatures
  • Proposed change to schnorr pubkeys 🔗
• Signet
  • C-Lightning 0.7.2.1 released with support for signet 🔗
• Soft fork activation
  • Activation heights for previous soft forks hardcoded into Bitcoin Core 🔗
• Trampoline payments
  • BOLT PR and discussion about trampoline payments 🔗
• Vaults
  • Bitcoin vaults without covenants & weaknesses in previous vault proposals 🔗
• X-only public keys
  • Request for discussion about using x-only public keys in taproot 🔗

July 2019

• Generic signmessage
  • Bitcoin Core PR opened for BIP322 signmessage support 🔗
  • Searching for a bech32 signmessage format 🔗
• HD key generation
  • BIPs #784 updates BIP174 PSBTs to include a BIP32 xpub 🔗
  • Question about BIP32 extended pubkeys (xpubs) versus ypubs and zpubs 🔗
• Just-in-time (JIT) routing
  • Free rebalancing for JIT routing 🔗
  • Additional JIT routing discussion 🔗
• Signet
  • Progress on signet 🔗
  • C-Lightning adds support for signet 🔗
• Transaction bloom filtering
  • Bitcoin Core PR#16152 disables bloom filter support by default 🔗
  • Mailing list discussion about disabling bloom filters in Bitcoin Core 🔗
• Accountable Computing Contracts
  • ZKCP versus standardized atomic data delivery following LN payments 🔗
• Addr v2
  • Version 2 addr message assigned BIP155 🔗
• Anonymity networks
  • BIPs #766 assigns BIP155 to the addr v2 proposal for v3 onion addresses 🔗
• Channel announcements
  • Gossip update proposed 🔗
• Coinjoin
  • Fidelity bonds for imporoved sybil resistance in distributed coinjoin 🔗
• Compact block filters
  • BIP157 bandwidth higher than BIP37 bloom filters 🔗
• CPFP carve out
  • Bitcoin Core #15681 merged with CPFP carve out 🔗
• Hash Time Locked Contract (HTLC)
  • Stuckless Payments: idea for HTLCs that can be revoked prior to acceptance 🔗
• MuSig
  • LN gossip update proposal to use MuSig 🔗
• Partially signed bitcoin transactions
  • Update to the utxoupdatepsbt RPC in Bitcoin Core 🔗
• Redundant overpayments
  • Stuckless payments proposed 🔗
• Reproducible builds
  • Merged PR for reproducible build of Bitcoin Core using GNU Guix 🔗
• Schnorr signatures
  • Executive briefing: the next soft fork 🔗
• Sidechains
  • Notable changes: BIP301 🔗
• Submarine swaps
  • Lightning Loop adds support for user swap-ins 🔗
• Tapscript
  • BIP322 signmessage forward compatibility 🔗
• Timelocks
  • Fidelity bonds based on long-term timelocks 🔗
• Watchtowers
  • LND 0.7.0-beta release with initial watchtower support 🔗

June 2019

• Replace-by-fee (RBF)
  • Proposal to override some BIP125 RBF conditions 🔗
  • LND adds support for RBF fee bumping 🔗
  • Bitcoin Core removes mempoolreplacement configuration option 🔗
• MuSig
  • Optech executive briefing: the next soft fork 🔗
  • Breaking Bitcoin presentation: secure protocols on bip-taproot 🔗
• OP_CHECKTEMPLATEVERIFY
  • COSHV proposal replaced 🔗
  • Potential script changes, including new COSHV opcode 🔗
• Threshold signature
  • Talk summary: Secure Protocols on bip-taproot / threshold sigs with MuSig 🔗
  • Cryptographic Vulnerabilities in Threshold Wallets 🔗
• Anonymity networks
  • Bitcoin Core #15651 always binds to the default port when listening on Tor 🔗
• AssumeUTXO
  • CoreDev.tech demo and discussion of assumeutxo 🔗
• Channel announcements
  • LND #2985 waits to relay gossip announcements until there are there are at least ten 🔗
• Coin selection
  • Bitcoin Core PR#13756 adds flag to avoid address reuse privacy loss 🔗
• Consensus cleanup soft fork
  • CoreDev.tech discussion: cleanup soft fork 🔗
• Countersign
  • CoreDev.tech meetings: v2 P2P transport and countersign 🔗
• Covenants
  • CoreDev.tech discussion: potential script changes 🔗
• CPFP carve out
  • Proposal to override some BIP125 conditions, alternative to carve out 🔗
• Child pays for parent (CPFP)
  • LND #3140 adds support for RBF and CPFP fee bumping sweep transactions 🔗
• Dandelion
  • Erlay compatible with BIP156 🔗
• Eclipse attacks
  • Differentiating peers based on ASN instead of address prefix 🔗
• Erlay
  • Erlay proposed 🔗
• Gap limits
  • How can I mitigate concerns around the gap limit? 🔗
• Hardware wallet interface (HWI)
  • CoreDev.tech discussions: HWI integration into Bitcoin Core 🔗
• OP_CHECKSIGFROMSTACK
  • Discussion of potential script changes, including OP_CSFS 🔗
• Output linking
  • Bitcoin Core #13756 adds avoid_reuse wallet flag 🔗
• Quantum resistance
  • Bitcoin Core contributor meeting transcripts: taproot quantum discussion 🔗
• Reproducible builds
  • Breaking Bitcoin summaries: Bitcoin build system security 🔗
• Side channels
  • Presentation: Extracting Seeds from Hardware Wallets 🔗
• Signet
  • CoreDev.tech discussion: signet 🔗
• Spontaneous payments
  • Using ECDH for uncoordinated LN payments 🔗
• Statechains
  • Bitcoin Core contributor meeting discussion topic: blind statechains 🔗
• Taproot
  • Executive briefing: the next soft fork 🔗
• Tapscript
  • Executive briefing: Taproot and Tapscript 🔗
• Transaction origin privacy
  • Bitcoin Core #15834 fixes a bug introduced in #14897 semi-random order for requesting transactions 🔗
• Transaction pinning
  • Proposal to override some BIP125 RBF conditions to avoid pinning 🔗
• Utreexo
  • Utreexo Q&A session at CoreDev.Tech 🔗
• Version 2 P2P transport
  • CoreDev.tech discussion of v2 P2P transport proposal 🔗
• Watchtowers
  • LND PR #3133 adding support for altruist watchtowers 🔗

May 2019

• Taproot
  • Reducing taproot commitment size 🔗
  • Overview of Taproot and Tapscript 🔗
  • Extended summary of bip-taproot and bip-tapscript 🔗
• OP_CHECKTEMPLATEVERIFY
  • Proposed new opcode for transaction output commitments 🔗
  • Detailed summary: proposed transaction output commitments 🔗
• Payment batching
  • Presentation: A Return to Fees, covering techniques including batching 🔗
  • Proposed new opcode to make batching more efficient during fee spikes 🔗
• SIGHASH_ANYPREVOUT
  • New proposed SIGHASH_ANYPREVOUT mode 🔗
  • Criticism of SIGHASH_ANYPREVOUT and a generic alternative 🔗
• Tapscript
  • Extended summary of bip-taproot and bip-tapscript 🔗
  • Overview of Taproot and Tapscript 🔗
• Covenants
  • New proposed opcode: OP_CHECKOUTPUTSHASHVERIFY 🔗
• Cross-input signature aggregation (CISA)
  • Taproot to not include cross-input signature aggregation 🔗
• CVEs (various)
  • CVE-2012-2459: part of motivation for taproot tagged hashes 🔗
• Eltoo
  • SIGHASH_ANYPREVOUT proposal compatible with Eltoo 🔗
• HD key generation
  • Suggestion to include BIP32 derivation paths in BIP174 PSBTs 🔗
• Hash Time Locked Contract (HTLC)
  • Example of using taproot/tapscript with HTLCs 🔗
• Hardware wallet interface (HWI)
  • Bitcoin Core 0.18 with basic hardware signer support 🔗
• MAST
  • Overview of Taproot and it’s MAST-based encumbrances 🔗
• Miniscript
  • Final stack empty, insights from miniscript development 🔗
• OP_CAT
  • Alternative to COSHV (CTV) and SIGHASH_ANYPREVOUT: OP_CAT and OP_CHECKSIGFROMSTACK 🔗
• OP_CHECKSIGFROMSTACK
  • Criticism of OP_COSHV and SIGHASH_ANYPREVOUT; OP_CSFS as alternative 🔗
• Pay-to-Contract (P2C) protocols
  • Eclair #965 allows specifying custom preimages, which can be used with pay-to-contract 🔗
• Partially signed bitcoin transactions
  • PSBT enhancements included in Bitcoin Core 0.18 🔗
• Reproducible builds
  • New reproducibly-build architecture and Snap packages for Bitcoin Core 🔗
• Soft fork activation
  • Draft taproot proposal deliberately omits activation mechanism 🔗
• X-only public keys
  • Suggestion to use x-only public keys in taproot 🔗

April 2019

• Segregated witness
  • Question: Are there still miners or mining pools which refuse to implement SegWit? 🔗
  • Bitcoin Core #14039 causes Bitcoin Core to reject legacy transactions encoded as segwit 🔗
  • Bitcoin Core #15846 relays and mines transactions paying any segwit address version 🔗
• Uneconomical outputs
  • Question: how does LN handle dust and uneconomical payments? 🔗
  • Question: how was the dust limit chosen? 🔗
• AssumeUTXO
  • Assume valid discussion 🔗
• Channel announcements
  • LND #2740 implements a new gossiper subsystem which puts its peers into two buckets 🔗
• CLTV expiry delta
  • LND #2759 lowers the default CLTV delta for all channels from 144 blocks to 40 blocks 🔗
• Compact block filters
  • Basic BIP158 support merged into Bitcoin Core 🔗
• Hold invoices
  • C-Lightning #2540 adds hook allowing plugins to implement hold invoices 🔗
• Hash Time Locked Contract (HTLC)
  • Question about whether HTLCs are cost effective for micropayments 🔗
• Sidechains
  • Elements Project bech32-like addresses 🔗
• Trampoline payments
  • Trampoline payments for LN 🔗

March 2019

• Consensus cleanup soft fork
  • Cleanup soft fork proposal 🔗
  • Consensus cleanup background 🔗
  • Consensus cleanup discussion: codeseparator & sighash types 🔗
• CVEs (various)
  • CVE-2012-2459: related to new Bitcoin Core vulnerability disclosure 🔗
  • CVE-2017-12842: merkle tree fix proposed in consensus cleanup soft fork 🔗
  • CVE-2013-2292: poor tx verification performance inspires consensus cleanup 🔗
• OP_CODESEPARATOR
  • Proposed consensus cleanup soft fork: prevent use of OP_CODESEPARATOR 🔗
  • Consensus cleanup background: legacy transaction verification 🔗
  • Discussion about cleanup soft fork: concerns about OP_CODESEPARATOR 🔗
• Merkle tree vulnerabilities
  • Disclosure of invalidity caching vulnerability 🔗
  • CVE-2017-12842: merkle tree fix proposed in consensus cleanup soft fork 🔗
• Responsible disclosures
  • Suhas Daftuar disclosed a bug that could temporarily exclude a Bitcoin Core node from consensus 🔗
  • Sec.eine responsibly disclosed a node stalling vulnerability in Bitcoin Core 🔗
• Accidental confiscation
  • Invalidation of OP_CODESEPARATOR could prevent existing UTXOs from being spent 🔗
• Addr v2
  • Version 2 addr message proposed 🔗
• Anonymity networks
  • BIP for new address relay message to support Tor v3 onion addresses 🔗
• ASICBoost
  • Bitcoin Core #15471 removes warning falsely triggered by use of overt ASICBoost 🔗
• Bech32(m)
  • Bech32 sending support (24-part series) 🔗
• Block explorers
  • Esplora updated 🔗
• Channel announcements
  • LND #2690 puts more gossip traffic in a queue to allow prioritizing urgent information 🔗
• Hold invoices
  • LND #2022 merged adding support for hold invoices 🔗
• Hash Time Locked Contract (HTLC)
  • Lightning Loop: new tool using HTLCs for onchain/offchain swaps 🔗
• MuSig
  • Extensions to PSBTs to help make them compatible with advanced protocols 🔗
• Output linking
  • Esplora block explorer updated with privacy warning against address reuse 🔗
• Pay-to-Contract (P2C) protocols
  • Proposal to add extension fields to PSBTs for pay-to-contract 🔗
• Partially signed bitcoin transactions
  • Discussion of PSBT extension fields 🔗
• SIGHASH_ANYPREVOUT
  • Discussion about increasing SIGHASH_NOINPUT_UNSAFE safety 🔗
• Signet
  • Feedback requested on signet 🔗
• Soft fork activation
  • Consensus cleanup soft fork proposal (plans for BIP9 activation) 🔗
• Submarine swaps
  • Lightning Labs announces a new tool and service to facilitate submarine swaps 🔗
• Testnet
  • Feedback requested on signet, an alternative to testnet 🔗
• Time warp
  • Consensus cleanup proposal: fix the time warp attack 🔗
• Timelocks
  • Lightning Loop announce, using submarine swaps with onchain timelocks 🔗
• Version 2 P2P transport
  • Announcement of v2 P2P transport proposal 🔗
• Watchtowers
  • LND PR #2618 implementing private watchtower support 🔗

February 2019

• Adaptor signatures
  • libsecp256k1-zkp library updated with support for signature adaptors 🔗
  • Q&A: what’s the difference between taproot and signature adaptors? 🔗
• Anonymity networks
  • Eclair #736 adds support for using and becoming an onion service 🔗
• BIP70 payment protocol
  • Bitcoin Core PR#15063 allows falling back to BIP21 parsing of BIP72 URIs 🔗
• Channel factories
  • Discussion of output tagging and its effect on eltoo and channel factories 🔗
• Dandelion
  • PRs that need more review or development 🔗
• Hardware wallet interface (HWI)
  • Bitcoin Core preliminary hardware wallet support 🔗
• MAST
  • It should be possible to upgrade miniscript for things like MAST 🔗
• Miniscript
  • Miniscript presentation 🔗
• MuSig
  • Libsecp256k1-zkp supports MuSig key and signature aggregation 🔗
• Output script descriptors
  • Descriptor checksum support added 🔗
• Proof of reserves
  • Tool released for generating and verifying bitcoin ownership proofs 🔗
• Partially signed bitcoin transactions
  • Three new Bitcoin Core RPCs for managing PSBTs 🔗
• Replace-by-fee (RBF)
  • RBF in the wild (survey of RBF usage) 🔗
• Reproducible builds
  • Notable Bitcoin Core PRs: reproducible builds using GNU Guix 🔗
• SIGHASH_ANYPREVOUT
  • Tagging outputs to increase safety of SIGHASH_NOINPUT_UNSAFE 🔗
• Soft fork activation
  • Presentation about probabilistic soft fork activation (“sporks”) 🔗
• Transaction origin privacy
  • Bitcoin Core #14897 introduces a semi-random order when requesting transactions 🔗
• Utreexo
  • Exploring accumulators 🔗

January 2019

• Unannounced channels
  • C-Lightning #2230 adds a private flag to the listpeers RPC 🔗
  • C-Lightning #2234 adds route hints for private channels to invoice RPC 🔗
• Watchtowers
  • LND PR #2448 adding a standalone watchtower 🔗
  • LND PR #2439 adding a default policy for the watchtower 🔗
• Dandelion
  • What’s the BIP156 hold-up in Bitcoin Core? 🔗
• Eltoo
  • Optimization for Eltoo-based payment channels 🔗
• MAST
  • Should OP_CODESEPARATOR be disabled in MAST scripts? 🔗
• OP_CODESEPARATOR
  • Should OP_CODESEPARATOR be included in future Script language upgrades? 🔗
• Output linking
  • Weak signature nonces discovered in reused addresses 🔗
• Payjoin
  • Mailing list discussion about BIP79 Bustapay 🔗
• Payment probes
  • Eclair 🔗
• Segregated witness
  • Bitcoin Core #14811 updates the getblocktemplate RPC to require that the segwit flag be passed 🔗
• SIGHASH_ANYPREVOUT
  • SIGHASH_NOINPUT_UNSAFE edge cases 🔗
• Spontaneous payments
  • LND PR for spontaneous LN payments 🔗
• Static channel backups
  • LND #2370 now updates a channel.backup file each time a new channel is opened or closed 🔗

December 2018

• Minisketch
  • 2018 year-in-review: research into reducing transaction relay data 🔗
  • Minisketch library released with implications for Bitcoin and LN 🔗
• Taproot
  • Taproot (major developments of 2018, January) 🔗
  • What a taproot soft fork might look like 🔗
• Block explorers
  • Modern open source block explorer 🔗
• Channel factories
  • 2018 year-in-review: eltoo lays groundwork for channel factories 🔗
• Countersign
  • 2018 year-in-review: untrackable authentication 🔗
• CPFP carve out
  • CPFP carve out proposal 🔗
• Child pays for parent (CPFP)
  • CPFP carve-out proposed 🔗
• CVE-2018-17144
  • 2018 year-in-review: CVE-2018-17144 🔗
• CVEs (various)
  • CVE-2017-12842: vulnerability in Bitcoin SPV proofs 🔗
• Dandelion
  • 2018 year-in-review notable developments: BIP156 Dandelion 🔗
• Eltoo
  • 2018 year-in-review: Eltoo 🔗
• Generic signmessage
  • 2018 year-in-review: initial discussion that became BIP322 🔗
• MAST
  • Taproot: an optimization for MAST 🔗
• Merkle tree vulnerabilities
  • CVE-2017-12842 leaf-node weakness 🔗
• MuSig
  • 2018 year-in-review: publication of MuSig protocol 🔗
• Package relay
  • CPFP carve out suggested but package relay needed for completeness 🔗
• Payjoin
  • 2018 year-in-review: Pay-to-EndPoint (P2EP) 🔗
• Payment batching
  • 2018 year-in-review: about 11% of payments used batching 🔗
• Replace-by-fee (RBF)
  • 2018 year-in-review: transaction statistics 🔗
• Responsible disclosures
  • Sergio Demian Lerner disclosed CVE-2017-12842 which allows stealing from SPV wallets 🔗
• SIGHASH_ANYPREVOUT
  • 2018 year-in-review: SIGHASH_NOINPUT 🔗
• Splicing
  • 2018 year-in-review: splicing 🔗
• Testnet
  • Open source release of esplora, a block explorer supporting testnet 🔗
• Timelocks
  • Transaction pinning as a major challenge for protocols involving timelocks 🔗
• Transaction pinning
  • Eltoo may not be entirely reliable because of transaction pinning 🔗

November 2018

• Liquidity advertisements
  • Proposal for nodes to advertise liquidity 🔗
  • Allowing dual funding for liquidity management 🔗
• Segregated witness
  • Temporary reduction in segwit block production 🔗
  • Bitcoin Core #14454 adds support to the importmulti RPC for segwit addresses and scripts 🔗
• Adaptor signatures
  • Discussion about problems in LN solvable using signature adaptors 🔗
• Anchor outputs
  • Simplified fee bumping for LN 🔗
• Atomic multipath payments (AMPs)
  • LN protocol 1.1 goals: multipath payments 🔗
• Bech32(m)
  • Bech32 security update for C implementations 🔗
• Child pays for parent (CPFP)
  • Simplified fee bumping for LN 🔗
• Dual funding
  • LN protocol specification 1.1 goals: dual funding 🔗
• Large channels
  • LN 1.1 specification meeting: wumbo channels and payments proposal 🔗
• Multipath payments
  • LN protocol 1.1 goals: multipath payments 🔗
• Payment probes
  • Making path probing more convenient 🔗
• Proof of payment
  • Discussion about LN’s proof of payment not proving who paid 🔗
• Rendez-vous routing
  • Lightning Network protocol 1.1 goals: hidden destinations 🔗
• Responsible disclosures
  • Trezor team disclosed a bug in the C-language bech32 specification affecting multiple wallets 🔗
• SIGHASH_ANYPREVOUT
  • Proposal included additional data in sighashes 🔗
• Splicing
  • LN 1.1 protocol goals 🔗
• Transaction pinning
  • What is transaction pinning? 🔗
• Unannounced channels
  • LND #1944 tweaks sendtoroute RPC to allow routing via private channels 🔗
• Watchtowers
  • LND PR #2124 adding support for detecting and using onchain spends 🔗

October 2018

• Adaptor signatures
  • Multiparty ECDSA for scriptless LN channels 🔗
  • Fast multiparty ECDSA compatible with signature adaptors 🔗
• Scriptless multisignatures
  • ECDSA multisignatures for scriptless Lightning Network payment channels 🔗
  • Two papers published on fast ECDSA multisignatures 🔗
• Threshold signature
  • Paper published about ECDSA threshold signatures 🔗
  • Pairing-based threshold signatures with signer auditability 🔗
• Time warp
  • Forward blocks: on-chain capacity increases without a hard fork 🔗
  • Fixing the time warp bug: a discussion 🔗
• ASICBoost
  • Overt ASICBoost support for S9 miners 🔗
• BIP70 payment protocol
  • Bitcoin Core PR#14451 allows building Bitcoin-Qt without BIP70 support 🔗
• BLS signatures
  • Presentation: compact multisignatures for smaller blockchains 🔗
• Covenants
  • Scaling Bitcoin Tokyo 2018, Script Roundtable: OP_CHECKSIGFROMSTACK 🔗
• CVE-2018-17144
  • CVE-2018-17144 exploited on testnet 🔗
• Fee sniping
  • LND #2063 updates sweeper to use nLockTime anti fee sniping 🔗
• HD key generation
  • Bitcoin Core #14150 adds key origin support to descriptors for tracking BIP32 xpubs 🔗
• OP_CHECKSIGFROMSTACK
  • Discussion: the evolution of Bitcoin Script, OP_CSFS discussion 🔗
• Output script descriptors
  • Key origin support 🔗
• Point Time Locked Contracts (PTLCs)
  • Talk about implementing 2p-ECDSA for LN funding and PTLCs 🔗
• SIGHASH_ANYPREVOUT
  • Discussion of the evolution of script: SIGHASH_NOINPUT_UNSAFE 🔗
• Splicing
  • Proposals for LN splicing 🔗
• Testnet
  • CVE-2018-17144 duplicate inputs bug exploited on testnet 🔗
• Utreexo
  • CoreDev.Tech summaries: Utreexo 🔗
• Watchtowers
  • LND PRs #1535 and #1512 adding server-side communication for watchtowers 🔗

September 2018

• CVE-2018-17144
  • Upgrade to Bitcoin Core 0.16.3 to fix DoS vulnerability 🔗
  • Upgrade to Bitcoin Core 0.16.3 to fix CVE-2018-17144 🔗
  • Information about CVE-2018-17144 🔗
• Coinjoin
  • Sighash updates that can help hardware wallets participate in coinjoins 🔗
  • Question about Wasabi coinjoin mixing and exchange blacklisting 🔗
• Responsible disclosures
  • Awemany disclosed CVE-2018-17144 as a DoS vulnerability in Bitcoin Core 🔗
  • Bitcoin Core developers quietly fix bug allowing invalid bitcoins after DoS report from Awemany 🔗
• Anonymity networks
  • LND #1516 adds support for automatically setting up a v3 onion service 🔗
• Default minimum transaction relay feerates
  • Bitcoin Core #13987 adds info about peers’ minimum feerates to getpeerinfo 🔗
• Generic signmessage
  • BIP322 proposed 🔗
• Payjoin
  • Bustapay discussion (simplified alternative to P2EP) 🔗
• Quantum resistance
  • BIP151 discussion, including about NewHope quantum-resistant key exchange 🔗
• Testnet
  • Discussion of resetting testent 🔗
• Timelocks
  • For BIP322 generic signed messages, unclear how to support timelocks 🔗
• Version 2 P2P transport
  • Criticism and defense of BIP151 choices 🔗

August 2018

• Version 2 P2P transport
  • Continuing work on P2P protocol encryption 🔗
  • PR opened for initial BIP151 support 🔗
• BIP70 payment protocol
  • Pay-to-EndPoint (P2EP) has elements similar to BIP70 🔗
• BLS signatures
  • Library announced for BLS signatures 🔗
• Coinjoin
  • BLS signatures library possibly useful for non-interactive coinjoins 🔗
• Compact block filters
  • Functions for generating BIP158 filters added to Bitcoin Core 🔗
• Dandelion
  • Dandelion DoS-resistant stem routing being researched 🔗
• Low-r grinding
  • Bitcoin Core wallet to begin only creating low-r signatures 🔗
• Minisketch
  • Researching bandwidth-efficient set reconciliation protocol 🔗
• MuSig
  • BLS signatures based on the MuSig construction 🔗
• Payjoin
  • Pay-to-EndPoint (P2EP) proposed 🔗
• Quantum resistance
  • PR opened for initial BIP151 support, NewHope quantum resistance to follow 🔗
• Responsible disclosures
  • Cory Fields disclosed a consensus failure vulnerability Bitcoin ABC (Bitcoin Cash) 🔗
• Static channel backups
  • C-Lightning #1854 partly implements option_data_loss_protect 🔗
• Time warp
  • Requests for soft fork solutions to the time warp attack 🔗
• Watchtowers
  • LND PR #1543 adding watchtower version 0 encoding and encryption 🔗

July 2018

• Partially signed bitcoin transactions
  • PSBT discussion 🔗
  • Features included in Bitcoin Core 0.17 🔗
  • New Bitcoin Core RPCs for initial PSBT support 🔗
• Coin selection
  • Coin selection groups for privacy and consolidation 🔗
  • Bitcoin Core unlikely to add coin selection RPC 🔗
• Default minimum transaction relay feerates
  • Discussion about lowering the default minimum relay feerate 🔗
  • Accidentially creating transaction below the default min relay feerate 🔗
• Schnorr signatures
  • Proposed schnorr BIP 🔗
  • Continued bip-schnorr discussion 🔗
• Coinjoin
  • CoinjoinXT presentation 🔗
• Coinswap
  • Talk about using schnorr signatures for blind coinswaps 🔗
• Dandelion
  • Discussion of Dandelion route selection 🔗
• Ecash
  • Blind signatures in scriptless scripts 🔗
• Output linking
  • Bitcoin Core #12257: new -avoidpartialspends configuration option 🔗
• Output script descriptors
  • First use of descriptors in Bitcoin Core 🔗
• SIGHASH_ANYPREVOUT
  • Renaming of SIGHASH_NOINPUT to SIGHASH_NOINPUT_UNSAFE 🔗
• Signer delegation
  • Continued discussion over graftroot delegation safety 🔗
• Testnet
  • High block production rate on testnet leading to degradation of service 🔗

June 2018

• Coin selection
  • Coin selection simulations 🔗
• Compact block filters
  • Discussion of what data should be included in BIP158 filters 🔗
• OP_CODESEPARATOR
  • Bitcoin Core 0.16.1 to cease relaying transactions using OP_CODESEPARATOR 🔗
• Pooled mining
  • Betterhash mining protocol draft specification published 🔗

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